As West Beverly prepares itself for the annual prom, Annie, Adrianna, Naomi, and Silver go out shopping together for the right evening gown to wear and try to get all glamored up for the event by visiting a famous hair stylist. A dateless Annie agrees to attend the event with the socially awkward Charlie, who has a massive crush on her. However, when he realizes that Annie is only interested in being friends, Charlie turns against Annie... showing his true repressed psychopath colors to plot a cruel revenge. Naomi attends the prom with Liam while she learns that Jen has emptied out her trust fund to support them living at Jen's new house. Meanwhile, Dixon is nominated for prom king, while Ethan learns that he has been accepted into lacrosse camp for the summer. Also, both Kelly and Harry take action to help Liam get on the right track, while he continues to try to temp Annie to embrace her own dark side as he has with his own. Ryan grows more closer towards Jen, and he also ignores Kelly's warnings that Jen is a devious, sociopath seductress whom is using him for self interest. At the prom, Harry informs the students in attendance that any after-prom activities will be dealt with punishment, while Navid provokes a fistfight with Ty when he reacts with indifference over the pregnant Adrianna's unborn child which is in fact his. When Silver learns that Dixon has nominated himself for prom king, she decides to enter for prom queen as a write-in candidate and finally gets to speak her mind to the attendees.

Adrianna and Navid are forced to make an impromptu exit from the prom when Adrianna goes into labor. Brenda Walsh shows up at the hospital to lend emotional support as Adrianna's labor gets more difficult. Harry and Debbie also turn up at the hospital with Kelly to lend emotional support to Adrianna when she decides to give her baby up for adoption. Across town, in defiance of Harry's orders not to throw any post-prom party, Naomi and Liam decide to throw a party in Jen's house, which she does not approve of. There, Dixon confronts Ethan about Silver when he notices that Ethan might be developing romantic feelings for his girlfriend. When Liam arrives late for the party, Jen takes advantage of his rebellious state. However, Naomi confronts and accuses Annie of seducing her boyfriend. Beaten up and humiliated, Annie leaves the party in a rage. Later, while driving home, Annie runs over someone with her car in a hit-and-run. Liam later decides to confess that it was Jen who seduced him and not Annie. He is unfortunately grabbed by parole officers and sent away by his stepfather to a military academy. Jen is left behind to claim herself as Naomi and everyone's savior... with no one suspecting her true nature.