Jae Hee is welcomed by everyone at Samgwang Villa. Chae Woon starts working at LX Fashion and has a hard time getting up to speed. A new tenant moves into the basement floor of Samgwang Villa. When Jae Hee recognizes him, he's very suspicious of his intentions. Sun Jeong helps out with the party at her boss' house and runs into Jung Won. Jung Won recognizes Sun Jeong.

Jung Won receives a mysterious call regarding her lost daughter. She's shaken over it. Hae Deun causes trouble again, and this time, she used Man Jeong's credit card without permission. Out of frustration, Man Jeong leaves Samgwang Villa. Chae Woon looks for Park So Mi, the girl who framed her for bullying Seo A back in middle school. However, So Mi pretends not to know about it. Meanwhile, Min Jae sends her divorce lawyer to Jung Hoo.

Sun Jeong gets Chae Woon to tell her what's going on, and Chae Woon explains it's about Seo A. Jae Hee finds out where So Mi, Seo A's middle school friend, works and tells Chae Woon. Later, Jae Hee tries to talk some sense into his dad, but instead, he ends up renouncing his inheritance. Meanwhile, Chae Woon visits So Mi and Hae Deun auditions for Slight Entertainment.

Jung Hoo wakes up in the emergency center but doesn't remember who he is. Sun Jeong sees he's having trouble, so she decides to let him stay at Samgwang Villa until he recovers fully. Jung Hoo begs Sun Jeong and Hwak Se not to tell anyone else that he's staying at their house, so they decide to keep it a secret from the other residents. Meanwhile, Seo A sees Chae Woon's baby photo and realizes that she was the baby in the photo that Jung Won had.

Ra Hoon tells Jae Hee about the suspicious offer Hae Deun got from a new agency. When Hae Deun is about to sign the fake contract, Jae Hee and Na Ro show up to save her. However, Hae Deun feels more embarrassed than grateful. Sun Jeong gets invited to the launching event party of LX Fashion. There, she sees Jung Won being sweet to Chae Woon.

Jae Hee takes Jung Hoo to get a checkup at the hospital. He finds out that he's perfectly fine. He questions for a moment that Jung Hoo could be lying but soon figures out that he's not. Jung Won gets invited to Samgwang Villa, where she meets everyone. Seeing how Chae Woon admires Jung Won so much, Sun Jeong decides to tell Chae Woon the truth. Meanwhile, Chae Woon rejects Jae Hee, saying she wants to be on good terms with Jung Won.

Sun Jeong tells Chae Woon that Jung Won is her birth mother. Shocked and confused, Chae Woon yells at Sun Jeong for not telling her sooner and insists on seeing Jung Won right away. They go to Jung Won's house, but they can't bring themselves to go inside. The next day, Jung Won asks Chae Woon to accompany her to the columbarium where she put the urn of her daughter, which she thought she had lost. Chae Woon is shocked by the fact that Jung Won thinks she doesn't exist in this world.

Chae Woon can't bring herself to go back home as she suddenly feels isolated and alone. She decides to have a sleepover at her friend's house, making Sun Jeong even more worried. Min Jae visits Jae Hee's neighborhood and sees Jung Hoo walking by. Chae Woon calls in sick because she's not ready to face Jung Won at work. Worried that things will get worse, Sun Jeong decides to meet Jung Won herself and tell her the truth.

Jung Won comes to Samgwang Villa to see Chae Woon, but she can't bring herself to take Chae Woon with her. Sun Jeong, along with everyone else, is shaken by the fact that Chae Woon could leave them anytime soon, but Chae Woon decides to stay with Sun Jeong, no matter what happens. However, Sun Jeong decides it's better for Chae Woon to live with Jung Won when he realizes how Pil Hong can mess up Chae Woon's life.

By chance, Chae Woon picks up a call from Jung Won's mom and hears things she shouldn't have heard. She decides to live with Jung Won to understand what really happened when she was young. Min Jae barges into Samgwang Villa in the middle of the night and finds Jung Hoo in Jae Hee's room. Jae Hee tells her that Jung Hoo has amnesia, and Min Jae is devastated. Meanwhile, Jae Hee finally finds out who Na Ro really is.

Chae Woon leaves Samgwang Villa and arrives at Jung Won's house. There, she meets Chun Seok, her grandmother, who had tried to blame everything on Sun Jeong. Seo A explodes into a jealous rage over Chae Woon's arrival. Meanwhile, Na Ro lashes out when Jae Hee suspects his motives, and Jung Hoo continues to get headaches when he starts to remember more from his past.

Min Jae comes to take Jung Hoo home, but he can't believe that Min Jae is his wife. Meanwhile, Hwak Se goes to sing at an event where Man Jeong is present. She sticks up for Hwak Se in front of all her friends, and they have a heart-to-heart conversation. Later, Jung Hoo wakes up in the hospital to find Jae Hee and Min Jae at his bedside.

Jung Hoo wakes up in the hospital with his memory restored. He heads home with Min Jae and Jae Hee. Meanwhile, Jung Won asks Chae Woon to open up to her more, but the mood in the house gets awkward when Seo A's jealousy continues to grow. Later on, Na Ro goes to see Seo A, and the pair come up with a scheme to get Chae Woon in trouble.

Chun Seok tells Sun Jeong to leave for Chae Woon's sake, but Sun Jeong stands her ground. Jung Hoo feels lonely now that he's back home, and Jae Hee suggests that they don't let the residents of Samgwang know about his memory coming back. Meanwhile, Chae Woon takes on a big project at work, but someone gets her into trouble on purpose.

Chae Woon tries to find out who's behind the conspiracy to sabotage her, but that only creates bigger gaps between Chae Woon and Jung Won. When Jae Hee finds out about what happened to Chae Woon, he suspects Na Ro and warns him to stay away from Chae Woon. Meanwhile, Sun Jeong finally makes up her mind to take action for Chae Woon.

Seo A gets upset when both Jung Won and Jae Hee try to only protect Chae Woon from troubles. Seo A is also going through a hard time, but Na Ro is the only person checking up on her. Meanwhile, Sun Jeong tells Jung Won that Chun Seok is threatening her. However, it only infuriates Chun Seok even more.

As Na Ro is following Seo A around everywhere, all the time, Jae Hee starts to worry about Seo A. Chun Seok tries to corner Sun Jeong again, but Jung Hoo stops Chun Seok and saves Sun Jeong from trouble. Both Jae Hee and Min Jae are suspicious about Jung Hoo's feelings for Sun Jeong. Meanwhile, Chae Woon meets Chun Seok to find out why she is constantly threatening Sun Jeong.

Na Ro shows up in front of Pil Hong and warns him not to provoke him in any way. Man Jeong remembers seeing Na Ro from prison and questions whether the side of him she knows now is genuinely who he is. Meanwhile, Chairwoman Lee calls Sun Jeong and threatens her to leave town, and Min Jae shares with Jung Won what she saw at Sun Jeong's place. Meanwhile, Jung Won becomes anxious about the fact that Pil Hong wants her to accept him as Seo Yeon's father.

Sun Jeong finally gets to clear her name regarding Chae Won but angers Chairwoman Lee and shocks Jung Won. Jung Hoo reflects on the past and regrets how selfish he had been. He promises to stay away from Min Jae and begins to change. Meanwhile, Pil Hong gets ready to make his move, and Man Jeong confronts Na Ro about his past.

Jung Hoo tells Min Jae to stop worrying about him and resumes working part-time at the restaurant. Still worried, Min Jae visits Sun Jeong for a quick chat. However, unknowingly, she leaves Sun Jeong's house with the dictionary that Jung Hoo had given her in the past. Meanwhile, Pil Hong has dinner with Chae Woon and Jae Hee and sews up Mr. Teddy that Chae Woon cherishes. Later, Jung Won invites Sun Jeong and the kids over for dinner.

Sun Jeong can't believe what Jung Won tells the directors and leaves the house without staying for dinner. Chae Woon takes her home. Man Jeong senses something strange and asks what happened, but nobody says a word. Later, Jung Won comes over to Samgwang Villa to apologize.

Hwang Na Ro becomes the chairwoman's personal assistant and a full-time employee. No matter how hard Jung Won is against the idea, she has no choice but to give in. Meanwhile, Jae Hee learns that Mr. Lee is Park Pil Hong, Chae Woon's father, who he had been trying to locate. However, after confronting him about it, he disappears from the job site.

Chae Woon says yes to Jae Hee's marriage proposal. However, when she gets home, Sun Jeong and Jung Won are there to let her know that it would be best if she returns to Samgwang Villa. Meanwhile, Pil Hong warns Na Ro to stay away from his daughter Chae Woon, and Ra Hoon keeps Ba Reun from leaving Samgwang Villa. Later, Jun A returns home to Jung Won and tells her that Park Pil Hong is working with Jae Hee.

Regrettably, Chae Woon figures out who Park Pil Hong is and runs out upset, blaming Jae Hee for not telling her. Man Jeong and Hwak Se meet with Na Ro and advise him to leave Samgwang Villa. Meanwhile, Pil Hong quits working for Jae Hee and leaves, and Jung Won warns her mother not to deal with Pil Hong. Later, Sun Jeong makes a big dinner for everyone at Samgwang Villa, and Seo A finds out about Jae Hee and Chae Woon's engagement.

Jae Hee and Chae Woon are stunned to hear Min Jae is against their marriage. Jae Hee figures it might have something to do with Jung Hoo and Sun Jeong's past relationship, and he heads over to see him. Meanwhile, Sun Jeong is shocked to learn that Na Ro left Samgwang Villa. Pil Hong works out a deal with Chairwoman Lee that could hurt Jae Hee. Later, Chae Woon talks with Jung Won and ends up quitting LX Fashion.