Kevin goes all out to create the perfect romantic setting for Valentine's Day. Lucy doesn't wanna attend because she had him agree not to propose on Valentine's Day. Eric and Annie convince Lucy to go. Kevin invites all the Camdens, his brother Ben and their mom to be there with him when he finally gets down on one knee to propose to Lucy. Meanwhile, Roxanne overhears Chandler practicing his own proposal to her but she asks him to wait so they won't steal Lucy and Kevin's thunder.

Eric flies to New York in a last attempt to convince Chandler's dying father to make peace with Chandler before it's too late. Meanwhile, Matt and Sarah suspect that she might be pregnant and Matt's co-worker lets the news slip to Eric; Lucy fears she might also be pregnant, which causes her to panic and push Kevin away; Mary tries to find Eric to tell him that she did something stupid; Lucy offers her classmate Christine a temporary place to live, unaware that she's hiding a big secret; Simon is crushed when Cecilia refuses to go to the prom with him; and no one can understand why Ruthie is acting especially strange.

The extended Camden clan wrestles with their emotions as they await the outcome of Eric's double bypass surgery. While under anesthesia, Eric hallucinates that he's Elvis. Lucy finally realizes that Kevin is the one and that she's ready to marry him, but he refuses to propose until Eric gives them his blessing. Simon complains to Annie about the absence of Matt and Mary during their father's health crisis. Sarah also comes to Glen Oak to wish Eric well.

When a nasty thunderstorm rolls through the region and threatens to postpone Lucy and Kevin's wedding, everyone scrambles to make it to the church in time. Mary barely catches the last flight in and brings Matt with her. Chandler and Roxanne rush to pick up Ben and his mother who are stranded at the airport in Las Vegas, but tensions run high and a fist fight breaks out; and Matt gives Lucy some very special brotherly advice when she confesses to pre-wedding jitters.

After Ruthie's boyfriend Peter grows more suspicious of his mother's new fiancé, Reverend Camden steps in to counsel the threesome and get to the root of their problems. Meanwhile, Chandler provides pre-marital counseling to a couple who don't seem destined for the altar; Cecilia confides to Simon the reason she doesn't want her parents to renew their wedding vows; and Roxanne tries to convince Chandler to return home to see his dying father.

Kevin is now living in the garage apartment and is madly in love with Lucy and waiting for the right time to ask Lucy to marry him. He invites his new rookie partner Roxanne over to meet Lucy who takes one look at her and flies into a jealous frenzy. Robbie is jealous of Kevin because he feels as though Kevin is like a new big brother taking over Matt's place. Robbie, who has been lamenting the departure of girlfriend Joy, may also be ready for romance when he runs into Kevin's partner Roxanne, an old classmate from 7th grade. Ruthie is asked to babysit a chimp which lives across the street. Ruthie also invites her boyfriend over which stuns Eric. Mary desperately tries to keep her mysterious new boyfriend a secret. When he unexpectedly shows up at the Camden home, no one is more surprised than Eric to see the good-looking 40-something pilot standing in the doorway.

Lucy is asked by a developmentally challenged friend to convince his parents to let him join a traveling troupe of puppeteers. Meanwhile, Eric is feeling low because he is stuck at home recovering from surgery and really wants to get back to work despite doctor's restrictions, so Annie asks the kids to help make him feel needed by going to him with their problems. Ruthie takes this suggestion to heart and secretly tells Eric how he should be helping everyone with their romantic entanglements. His meddling leads to chaos for everyone involved. Lastly, Kevin learns that Ben is planning to extend his temporary stay in Glenoak.

Eric begrudgingly agrees to see a therapist in order to appease Annie who is at her wits' end with him. Meanwhile, Simon is ecstatic when Cecilia's father agrees to let him see Cecilia, but feels hurt and confused when she starts avoiding him. Roxanne becomes suspicious when a pretty girl seeks council from Chandler. Lastly, Ruthie is shocked to learn that her new upbeat friend Katelyn suffers from cystic fibrosis.

Annie is plagued with curiosity about what goes on during Eric's therapy, but panics when his doctor invites her to attend one of their sessions. Meanwhile, Lucy tries everything to get excused from jury duty, upsetting Kevin in the process when her views of the judicial system are different from his own. Also, Chandler confesses the extent of his feelings for Roxanne after she is stabbed on the job by a homeless man. Lastly, Ruthie fears that her parents may be heading for divorce court after overhearing them fight.

Lucy confesses to her dad that it will break her heart if he doesn't perform the ceremony at her wedding and he struggles with the decision to return to the church. Meanwhile, Simon catches Cecilia's father's business manager stealing from petty cash. Roxanne's policeman father tries to bully Chandler into ending his relationship with Roxanne. Ruthie and Peter try finding Ben a girlfriend with his training dog, but things go awry once they lose the dog. Annie hijacks Lucy's wedding by making all of the decisions herself without paying attention to any of Lucy's wishes.

Reverend Camden and Chandler enlist the help of Ms. Bink to raise money for the church's leaky roof, but it turns out she needs a little help of her own. Meanwhile, Ruthie's boyfriend Peter suspects that his mother's new boyfriend has some secrets to hide; and Lucy and Roxanne have a girls' night out on the town during which Lucy shares intimate details of her newlywed life. Meanwhile, the twins steal money from their parents' bedroom and from a coffee can in the kitchen.

Ken Smith pays a visit to Eric and Annie to accuse Mary of seducing his son. He threatens to sell the land next to the church if Mary doesn't break up with Jack. Simon finds out from Cecilla that a girl from his dating service is pregnant. Simon turns to her to try to help her. He convinces her to drop her baby off at a hospital where the baby can go for safe keeping. Lucy wonders if Kevin has ever been with another women after she catches Ben reading her journal. When Ben picks Ruthie up from school, he see's a girl making fun of her and then she makes fun of him, which leads to the vice principal calling the police.

When Eric learns that he must undergo double bypass surgery, he calls a family meeting to share the news but loses his nerve at the last minute and decides the group should go bowling instead. His odd behavior surprises everyone, especially Annie who grows more concerned when Eric's brother-in-law Hank shows up unexpectedly. Meanwhile, Robbie pesters Kevin about helping him make a parking ticket disappear. Lastly, Lucy continues to question whether Kevin has ever been with another woman.

Eric gives Annie his manuscript to read but she's not happy to learn that he's been spending his time writing smut instead of his comeback sermon for the church. Meanwhile, Simon and Cecilia discuss having sex for the first time and naively share the news with their parents---which doesn't go to well when Cecilia's father finds out. Lastly, Lucy sets out to spy on Roxanne and Chandler on their first date.

When Eric and Annie learn that Morgan and Patricia Hamilton are facing a marital crisis, they draw on their own recent problems to stop their friends from making the same mistakes. Meanwhile, juggling her studies and planning her wedding leaves Lucy stressed, but when she confides to Kevin that she might quit school, he threatens to call off the wedding. Also, Simon and Cecilia go to a G-rated film to try to avoid thinking about sex and get kicked out for making out. Ruthie tries to find Ben a new girlfriend because Mary wants to get back together with Ben and Ruthie doesn't want Ben to get hurt. Lastly, Roxanne decides to resign from the police department when she feels that her father was kicked out of the police department unfairly.

Simon's paid dating service is becoming profitable until Cecilia rats him out to Eric. When Mary threatens to leave home over her relationship with Jack Smith, who is twice her age, Eric confronts Jack who lets the news slip that he and Mary are relocating to Fort Lauderdale. Lastly, Kevin sets Ruthie straight on who's the adult and who's the child in this household.

Eric is stunned to find out the church has hired a new associate pastor to help out while he recovers from his heart surgery. Meanwhile, Lucy is furious when she and Ruthie spot Kevin and Roxanne in a jewelry store--as she thinks they're picking out her engagement ring together without her. Meanwhile, Simon listens unenthusiastically as Cecilia tells him all about her new French boyfriend. Lastly, a loud, chain-smoking housekeeper sent by The Colonel arrives to provide order in the Camden household.

Eric's strange post-surgery behavior leads him to make a life-altering decision that shocks and worries Annie. The reverend considers another calling when the ministry begins to lose its appeal. His plan to abandon his religious duties is hatched after a new neighbor mistakenly calls him Mr. Camden. Fed up with everyone bringing their problems to him, Eric becomes more and more apathetic toward his family and community. Meanwhile, Lucy turns to the new associate pastor for advice when she sees Kevin and Roxanne having too much fun dancing at the pool hall. Concerned when he can't find Lucy, Kevin interrupts Simon and Cecilia's date to enlist their help.

In the midst of a career crisis and much to Annie's dismay, Eric takes a job as a talk DJ at a college radio station, but things become serious fast when Eric and his producer find themselves counseling a male student who calls in threatening suicide during his first shift. Lucy refuses to spend time with Roxanne which puts Kevin in an impossible situation. Later on, Roxanne asks her boss to assign her a new partner as tensions simmer between her and Lucy. Ben is almost arrested when he accompanies Simon and Cecilia to an underage club. Ruthie tries to figure out a way to breakup with her boyfriend without making him cry.

Unable to convince Chandler's father to see his son before he dies, Eric is forced into tricking him. Meanwhile, Eric, Annie and Sarah's mother Rosina get together to surprise Matt and congratulate him on the wonderful baby news. Mary confides a big secret to Lucy. Simon gets turned down by a potential prom date. Ruthie gets her period and tries to hide the news from everyone. Kevin recognizes Lucy's house guest Christine as a girl who was previously arrested for prostitution. Lucy takes a home pregnancy test without telling anyone. Lastly, bad news arrives on the Camdens' doorstep.

Eric and Rabbi Glass pay a visit to the church to spy on the new associate pastor. Meanwhile, Ruthie is in big trouble when she's caught slow dancing with her boyfriend when she's supposed to be babysitting Sam and David. Meanwhile, Lucy asks Simon to dig up some information on Roxanne during his ride-along with her and Kevin in their patrol car. Lastly, Kevin has some explaining to do to Lucy after he runs into his ex-wife.

Eric tries to help Chandler after the young minister learns that his father is dying of lung cancer, but Chandler rejects Eric's aid and pushes him away. Lucy accepts a date with Chandler's chain-smoking tattooed brother Sid in order to make Kevin jealous enough to propose to her. Elsewhere, Annie is shocked when she finds a pack of cigarettes in Simon's bedroom. Lastly, Ruthie's friend Peter begs her to lie and not tell his mother that he smokes.