CHAI CHEUNG had a night full of nightmares. The most daunting one was the resignation of his nurse, SUSAN. But when he tells his two sisters, CHAI SUM and CHAI CHUEN, they both think it is not a bad thing for SUSAN to go. SUSAN hands it her resignation to CHEUNG as gets to the clinic. He turns to his good friend TONG KAM-PO for help. PO suggests hiring a replacement before SUM and CHUEN find out about it. PO has arranged a beautiful girl called “BLUEBERRY” to come for an interview. But two other nurses show up instead. It turns out that CHUEN and SUM have learnt about the matter and has each arranged a nurse for him.

The two applicants, CHU and FUN, have a few rounds of contest. CHU outdoes FUN at the beginning, but she gets in an awful fluster when CHEUNG is giving an injection to a naughty boy. He gets kicked by the boy because of her. Meanwhile, FUN appears and finishes the task easily. CHUEN tells CHU it is ones’ professionalism rather than one’s looks that counts. TSEUNG-KIM wants to invite SUM to movie but he stands back when FUN pops up. CHUEN cooks a pot dish for dinner so as to revenge SUM. Nobody appreciates the dish. Quoting SUM, CHUEN says that one should not judge a book by its cover, and then makes SUM eat the dish. CHEUNG knows that a third world war is soon to break out.

PO takes CHEUNG to a bar. A lady named CHERRY is being flirted with by some men. CHEUNG goes up to her help. He feels dizzy after drinking a drink that has been laced with drugs. Knowing very well that he will not make it home by himself, he asks CHERRY to accompany him back to his clinic. He looks very pale, and so CHERRY gives him an external cardiac massage. The next day when CHUEN and SUM show up, they are astonished to find CHUENG and CHERRY lying on the floor. CHEUNG has no memory of what happened last night. AUNTIE SZE suggests referring to the CCTV footage. Taking PO’s advice, CHUEN and SUM agree to let CHEUNG employ the nurse he wants. CHEUNG is on his way to the clinic when he notices that CHERRY is keeping a watch him from a distance.

KIM has a Band-Aid on his forehand. CHEUNG and PO wonder what has happened to him, but he himself looks very happy. KIM recalls how he met SUM and how he was attracted by her “three smiles”. CHEUNG does not like the idea of employing CHERRY, but he dares not complain to his sisters either. SUM has an argument with CHEUNG and PO over drugs. CHERRY mistakenly concludes that SUM is a drug dealer. As soon as she has overheard PO and CHEUNG talk about KIM’s plan, CHERRY informs her supervisor to prepare for an arrest operation. No sooner has SUM got go board the ship than KING SZE and his team members show up, pointing a gun at KIM and SUM. KIM strikes back. CHERRY realizes she has made a mistake.

PO likes CHERRY. He invites her to lunch. As she needs to carry out her investigation, she turns him down with the excuse that she has prepared her own lunch. She is sneaking into PO’s room when AUTIE SZE catches her on the spot. For fear that AUNTIE SZE would find out about her true identity, she is determined to make her disappear. MRS CHOW, who is a customer, orders AUNTIE SZE in an arrogant air. Feeling angry, AUNTIE SZE speaks ill of her in the intercom. CHERRY makes sure everybody at the clinic can hear AUNTIE SZE’s remarks. AUNTIE SZE requests CHUEN to give AUNTIE SZE the axe. CHEUN is put in a dilemma, as MR CHOW is her husband’s, KOT YAT-TO, boss. For the interests of everybody concerned, she decides to fire AUNTIE SZE.

CHEEY is surprised that the other three nurses are enjoying their breakfast as she enters the clinic. CHEUN and SUM realize they have forgotten to tell AUNTIE SZE to resume her job. PO objects to have her again. A young woman named MANDY has come to look for PO. As she acts as if she was under the effect of drugs, CHERRY concludes PO has supplied her with drugs, and despises him even more. AUNTIE SZE has breakfast on her own. CHERRY feels sorry for her. Touched, AUNTIE SZE apologizes to her, saying she will not blame her for coveting her magazine coupons. AUNTIE SZE mentions MANDY as they chat. CHEERY realizes then that what PO has been supplying MANDY is not LSD indeed. AUNTIE SZE asks CHERRY to pass the key to the locker at the clinic to…

CHEUNG is shocked to see that the clinic is packed with children. He smiles when he sees how well CHERRY is taking care of them. The thought of pairing them up occurs to CHUEN. CHEUNG is due to hand is his thesis on children psychology. SUM has to remind him from time to time. CHEUNG asks CHERRY out on a date when they finish work. She turns him down, knowing very well that he is only doing this to please CHUEN. But when SZE learns about this, he requests her to go out with him so as to find out about the drug dealer. Someone calls CHEUNG in the middle of their date. His face pales all of a sudden and he has to leave immediately. CHERRY and SZE follow him. CHEUNG talks to a woman about money. SZE lip-reads them.

PO comes to know that KA-YIM is taking part in a taekwondo contest because of SHIRLEY, who works at a TV station as an executive producer. SHIRLEY requests YIM to sign a contract, but he hesitates, worrying that he will meet with his mother SUM’s opposition. PO encourages him to win over his mother, but SUM strongly opposes his participation in the contest. What is more, she turns down the contract offer for YIM. He is so angry that he leaves home. CHEUNG has a talk with PO over SUM and YIM, during which PO brings about the fact that SUM is not YIM’s biological mother. Watching SUM packing clothes for YIM, CHUEN knows she still cares a lot about him. SUM insists that an adoptive mother can never compare to a real mother. The whole clinic has come to the watch YIM play. YIM has injured his back muscles at PO’s house. Therefore although he is neck and neck with his opponent, he is soon forced into an inferior position

KOT KEI is a houseman in Obstetrics and Gynaecology at a public hospital. DR. SHE tells her to take good care of a patient. She promises she will do her best. PO visits a patient called JENNY in KEI’s ward. Apparently drunk, she accuses PO of leaving her and their baby. KEI is given a severe telling-off by DR. SHE for leaving her own patients alone for the sake of working for her colleagues. PO happens to see this. KEI and PO walk past the emergency room, where a mother and her teenage girl are waiting. PO deduces from the teenager’s expression that she might be pregnant. He decides to sound her out. KEI is deeply impressed by his observation power. PO tells her every doctor has his limitation, but he should always be responsible for his patients.

SZE wants CHERRY to steal the data in CHEUNG’s cell phone so as to track down the real drug dealer. Although she fails to accomplish his mission, she manages to get his USB. However, when she sees him being scolded by SUM for losing the USB, she returns it immediately. SZE concludes that CHERRY is suffering from the Stockholm Syndrome, believing this is the reason she sympathies with CHEUNG. SZE decides to unveil CHEUNG to her. CHEUNG puts a small packet into the backpack of a boy. CHERRY believes there is something devious in this. So she takes the small packet to SZE. They are both certain that CHEUNG must hide some drugs in the plush inside the packet. But when he tears open the plush, he finds nothing suspicious.

KIM wants to buy a present for SUM to celebrate the 25th anniversary of knowing each other. This reminds CHEUNG that TO and CHUEN’s silver jubilee is round the corner. TO however says that they will not have any special celebration. TO and CHUEN have recently had a body check-up. KEI takes a look at their X-rays. She is pleased to see her parents have very healthy lungs. TO shares with his two daughters the lovely memory of him and their mother in the past. For fear that he and SUM will lose their feelings for each other, he is determined to do something before it is too late. His daughters suggest they revisit the places they used to go. TO takes CHUEN to the restaurant of their first date. He is disappointed to find the food there is far from satisfactory now. They are let down again when they find that the Stone of Marriage has turned into a columbarium.

PO has bought CHING YEE a hamburger set for breakfast. He plays with a small toy when she makes him a cup of coffee. She realizes then that he bought her breakfast just because he is collecting the “Ding Dong the Transformer” set. PO is upset that he has failed to find the limited edition of the set. Worrying that PO will take advantage of YEE again, SUM tells KIM to pay attention to YEE. SUM is collecting the toy set for her daughter, KOT FAI. When he knows this, KIM claims he can get the limited edition easily. With a view to getting the limited edition, YEE eats fast food shop every day and gets a mouth ulcer as a result. CHEUNG tells her she can indeed bid it on the Internet. So she bids for it, but a person named “Truly Madly Deeply” starts a fierce competition with her.

To speed up his investigation, SZE pretends to be a triad member and forces CHERRY repay her debt. CHERRY lies to CHEUNG that her brother is seriously ill and that she has borrowed money from a load shark. When she finishes, she hints that she would like to “get rich quick”. CHEUNG therefore introduces her to UNCLE KAU. Wrongly believes that UNCLE KAU is telling CHERRY to take drugs, SZE breaks into the room. In the nick of time CHERRY claims that SZE is her boyfriend. CHEUNG works at his friend’s clinic temporarily. He is surprised to see SZE, his wife and their son in the clinic. He takes CHERRY to the clinic to let her see the “true side” of SZE. For fear that CHEUNG will find out about her identity of an undercover cop, she claims she has been cheated by SZE. Later, CHEUNG takes CHERRY to work as a substitute, where they bump into SZE and his family members again.

CHUENG kisses CHERRY by accident. Both of them have a special, sweet feeling. CHEUNG is worried that they cannot go any further because of his two sisters. CHERRY is talking on the phone. CHEUNG overhears she say she is meeting PO at a hotel. So he follows her to the hotel, where he tells her “he knew everything”. Mistakenly believes that he has discovered her identity as a cop, she kicks him with all her might. Realizing that his love is not accepted, he leaves in huge disappointment. CHERRY tells SZE CHEUNG has expressed his love for her. SZE thinks this is a good opportunity to approach CHEUNG. To give their relationship a push, he pretends to be a loan shark again, chasing her for payment.

YIM and FAI are wrestling with each other when CHUEN and SUM get home. CHUEN tells them to stop at once, saying that they are not children anymore. SUM does not see what the fuss is about. KIM and CHUEN meet FAI and YIM on the street. Seeing that the two youngsters acting sneakily, they follow them to a tenement house. They cannot help worrying when they see the sea of abortion advertisement. YIM discovers them. He explains that he and FAI have only come to look for an unprecedented kung fu master. CHUEN very much doubt there is any unprecedented kung fu master, believing it is just another scam. YIM and FAI disagree, as they have won the master money on the mahjong table. CHUEN decides to go up and unmask the kung fu master.

It takes everybody by surprise that kung fu expert SAIMOON PIU-SUET and CHERRY’s father are fellow kung fu students. SUET reveals CHERRY’s identity as a cop. CHEUNG and CHERRY try to explain to CHUEN and SUET, but CHUEN and SUET are convinced that the other is a bad person. CHUEN swaps CHERRY and AUNTIE SZE’s job duties as soon as she has returned to the clinic. PO invites CHERRY to a date right in front of CHEUNG. CHUEN has arranged a date for CHEUNG and CHU with the hope to pair them up. CHERRY is very angry that CHEUNG does not turn down his sister’s arrangement. She decides to go out with PO. The two pairs bump into each other at the restaurant. When PO learns about CHERRY and CHEUNG’s relationship, he volunteers to give them a hand. He tells CHUEN SUET is a kind-hearted person and that she has had a difficult life. On the other hand, as told by PO, CHERRY tells SUET about CHUEN’s “plight”.

KIM, in his Sunday best, cannot wait to take SUM to the opera. SUM cannot make it because of YIM. SUM sends KIM his medical report in person. He grasps the opportunity to invite her to the opera again, but she turns him down, using family day as an excuse. PO points out frankly to KIM that SUM is determined not to give him any chance. SUM’s husband, LIM, died many years ago. She visits his grave with YIM. As YIM has left his medal behind at the grave, they turn back halfway. YIM sees KIM standing at his father’s grave as he walks past a tree. KIM, looking very solemn, tells LIM he has been taking very good care of SUM and YIM. PO advises KIM to show YIM his strengths. He replies that swimming is his strength. SUM and YIM go to an old people’s home to do voluntary work. KIM goes with them, resulting in a resident’s heart attack.

Failing to patch up CHUEN and SUET, CHEUNG and CHERRY have to continue to keep their relationship underground. CHUEN calls for a family meeting with SUM and CHEUNG, during which she accuses CHEUNG of going out secretly with CHERRY. CHUEN and SUM have different opinion on CHEUNG and CHERRY’s relationship. SUM believes CHEUNG has every right to choose his girlfriend, but CHUEN says he cannot go out with CHERRY because she belongs to the same kung fu school of SUET. She adds that she will only let CHERRY work at the clinic for six more months. CHUEN is keeping a close watch on CHEUNG. He turns to PO for help. PO tells him to rest assured. Although CHUEN asks CHERRY to work overtime, with PO’s help CHEUNG still manages to see CHERRY.

SZE shows CHERRY the DNA reports of CHEUNG and FOON-HEI. The reports indicate that CHEUNG and HEI are father and daughter. SZE requests her to quit her job, saying that her Stockholm syndrome is getting worse. So she hands in her resignation letter the first thing she returns to the clinic, her reason being CHUEN having a bias against her. CHEUNG follows CHERRY to a restaurant to ask her what is going on. He is taken aback when he learns that she and SZE have started over again with each other. What is more, CHERRY accuses him of failing to protect her. In order to make him give up his hope on her, she requests SZE to kiss her. CHEUNG is so upset that he cannot concentrate at work. Everybody in the clinic blames CHUEN for breaking up CHEUNG and CHERRY.

CHEUNG and CHERRY decide to make public their relationship. CHEUNG is meeting CHERRY. CHUEN is not happy that he does not go home for dinner because of this. On the other hand, CHEUNG is worried that CHUEN will get mad with him, but PO thinks if he really wants to get rid of her control then he should stay put. CHERRY visits SUET. She is curious to know why SUET hates TUNGFONG TSUI-SUET. So SUET tells her how TSUI-SUET used her to get rid of her father’s control. This worries CHERRY, as it seems that she is now facing the same plight. On the other hand, SUET does not like CHEUNG, as she believes he will treat CHERRY the way TSUI-SUET treated her. SUET tells CHERRY to do a fart in public so as to see test CHEUNG’s for her. CHERRY does as told. CHEUNG takes the blame for her without hesitation. Later, SUET discovers that CHERRY has helped CHEUNG. CHERRY explains that she did so because she really loves CHEUNG.

When To realizes he is on annual leave he is already fully dressed to work. His friends have stood him up. Feeling bored, he goes to the clinic. He takes KIM’s suggestion to pick up photography and takes out his old camera to take photos of FAI. The family goes BBQ. CHUEN puts up a long face when CHERRY shows up. With a view to forcing CHERRY to leave, she makes CHERRY hit her with a trick. TO and YIM have the photos taken at the BBQ developed. CHUEN did not smile in any of the photos. KIM therefore suggests that they fine-tune the photos with computer software. CHUEN likes her photos very much at first, but thinks she has been treated when she knows that they have been modified. TO has an accident when he is taking photos in the countryside. He calls CHUEN for help, but she takes it as another practical joke.

CHUEN visits KEI at the hospital. KEI gets along very well with her colleagues. CHUEN’s friends also think very highly of her. CHUEN is very proud of her daughter. Later, CHUEN and her friends walk past a basketball court where FAI is playing basketball with her friends. She is unhappy to see FAI behaving so unladylike and so requests her to pay attention to her manner. As a result, the mother and daughter enter into a cold war. TO tries his best to mediate between them. FAI thinks that SUM loves KEI more than her. Although TO assures her that CHUEN cares about her much more than KEI, FAI still cannot get it. On the other hand, TO advises CHUEN to use another approach to communicate with FAI. CHUEN has prepared a box lunch for FAI, but FAI does not appreciate it at all. Her classmates even laugh at the way CHUEN treats her.

SUM meets MAN-CHING on the way to the clinic in the morning. Before CHING opens her mouth, SUM tells her not to eat from street food stalls. But before she finishes, two men show up and take CHING away. The police gather information of CHING from SUM. They are surprised that she knows so little about CHING. As SUM never smiles at work, CHEUNG believes this has created a distance between she and her staff. SUM invites her staff to karaoke after work. Everybody is enjoying himself until SUM shows up. Everybody in the clinic, including PO, has had enough of her care. PO decides to speak up for the others and tell SUM…

TO wakes up to discover that CHUEN has gone to Guangzhou with her old schoolmates. He decides to be a good dad while she is away. He thinks of cooking breakfast for his daughters, but decides to eat out in the end. KEI is angry that TO keeps giving advice to her as she drives. TO is cooking when he hears a loud sound from the washing machine. He goes and checks it out, and sees that white foam keeps coming out from the machine. KEI wants to buy a new car. TO annoys her once again by giving too much opinions. TO is very upset, so CHEUNG gives him three envelops that CHUEN prepared before she went to Guangzhou. Her advice does not work though. He is playing computer games when he hears KEI and FAI’s scream.

SHIRLEY is looking for a pediatrician for her show. PO takes CHEUNG to her TV station for an audition. CHEUNG gets so nervous in front of the camera that he cannot stop hiccupping. CHERRY hits him out of the blue so as to stop his hiccupping. The hiccupping reminds CHEUNG of a similar episode in the past. He took part in a recitation competition when he was a primary student. His dean scolded him just before the competition was about to begin. As a result, he kept hiccupping. In order to help him overcome his psychological barrier, CHERRY returns to his primary school and visits the dean with him. CHEUNG is finally confidant enough to go to the recording of the TV show. Everything goes very smoothly and he is able to answer the host’s questions, until the MC JIN, the hip-hop rapper, appears suddenly…