Eric accuses Matt of doing drugs after finding marijuana in the house and after Matt's friend Mitch askes him to hold his marijuana. Meanwhile, at the same time Eric finds the marijuana in the house, it leads Annie to a confession of own her about her experimentation. Also, Simon teaches Ruthie about the fine art of doing laundry, eventhough Ruthie is little too young. Lastly, Lucy introduces her new clothing of all black and her new boyfriend Rod to the family.

Lucy must choose between her new boyfriend Rod and her former boyfriend Jimmy Moon after he is dumped by his old girlfriend Ashley, and wants Lucy back. While Lucy makes her decision, the rest of the Camden children are making bets to which guy Lucy will choose. Eric and Annie are at odds when they help newly married couples communicate with each other, but end up getting into a big fight themselves when discussing their burial plot arrangements within their own families. Also, a visit from Annie's father stirs up further problems in the Camden household when he arrives without Ginger after recently breaking up due to his hair piece (toupee).

Matt tries to find the right time to tell his parents that he's accepted an internship in Washington. Meanwhile, his concern for his sisters leads to a confrontation with Mary and Wilson.

Eric and Annie's parents arrive right in the middle of the crisis involving Mary and Matt; and Happy's original owner comes to take him back.

Simon wants to buy the perfect gift for Deena because its their three month anniversary, but it ends up consuming his time which annoys his friend, Nigel, who's visiting. Rod (Lucy's ex-boyfriend) is spending time at the Camden's home because his mother died and doesn't want to face his father as he's angry with him. Heather is back in town, and she tells Matt that she's engaged. Meanwhile, Dr. Hasting's---the doctor who almost killed Matt when he was born, works at Glen Oak Hospital and Annie is not thrilled, especially with the possibility that he may deliver her twin babies. Mary tells everyone that she's back with Wilson, but it's not true. She made it up to get attention from guys. Lastly, Michael Towner, who hitted Mary with his car two years ago calls her.

Mary and her basketball teammates are upset when their high school coach imposes a lockout on the season, citing that their studies should be top priority. When the school calls a meeting to discuss the situation, Eric and Annie support the coach's concerns and decisions. Outraged by the apparent betrayal, Mary and some members of the team break into the gym and vandalize it. They are soon caught by the police and are arrested. Meanwhile, sparks fly when Simon is caught making a lewd hand gesture in front of the school, and is busted. Also, Matt contemplates returning home and Ruthie obsesses about being one of the guys.

The Camden family rallies together after Mary's arrest. Mary truly learns the consequences of her actions after she learns that she is losing her scholarship to college, faces possible school expulsion and jail time. Eric and Annie enlist the help of a lawyer who manages to get Mary enrolled in a community service program. Simon and Ruthie feel overwhelming pangs of guilt for having some knowlege of Mary's intentions and not telling their parients about it. Simon and Ruthie decide to visit many different houses of worship to attain atonement. Also, Matt moves back home to help with the family, but soon realizes he needs to live on his own.

Mary's feelings for Robbie resurface when she inadvertently finds out he has a secret date for Valentine's Day, and the whole family schemes to uncover the mystery woman. Meanwhile, with the exception of Lucy who has a date with Jeremy, the other Camden kids feel deflated when their Valentine's plans fall through and they end up stuck at home celebrating Sam and David's second birthday. Lucy and Jeremy's first date does not go as expected as they both keep on running into Lucy's ex-boyfriends. Although all's well that ends well by the end of the episode for everyone.