Lucy gets an invitation to have pizza with two rebellious friends, then blames herself for the tragic car accident that claims her friend's life, and her sister in the hospital. After Lucy's friend is killed, the family rallies around her, noticing her unusually distant behavior. In addition, Mary does a favor for her ex-boyfriend Wilson and baby-sits his son Billy so he can go to his prom. Also, Simon gets his own room while Matt moves into the attic.

Eric suspects Lucy's ex-boyfriend Jimmy Moon is involved with drugs. Eric and Annie and the rest of the Camden family forbid Lucy to neither see nor speak to him anymore. Lucy does not listen to them and she gets a lot more than what she bargained for when trying to help Jimmy. Meanwhile, Ruthie tries to keep Matt and his new girlfriend Shana apart as she avoids telling Matt that Shana has been calling the house. Lastly, Simon tries out for the baseball team and uses Mary as a good reference, even though he stinks.

Matt stays out all night with Sarah and they secretly elope, but when facing their parents they're only able to summon the courage to say that they're engaged. A worried Annie tries to calm Eric down, who is convinced that Matt did something foolish. Meanwhile, Lucy and Mary search for Ruthie because they suspect that she knows what really happened during Matt's night out. Ruthie and Matt agree to keep the marriage a secret until a Jewish wedding in a few months.