Harbor's senior prom brings out the best and the worst in everyone. Taylor has a great time, while Summer does not enjoy herself with her surprising prom date. Seth and Anna come up with a plan to win Summer back for Seth. Meanwhile, Marissa convinces Volchok to go to the prom with her, and Ryan brings an unexpected old flame. When one of the girls is elected prom queen, it truly becomes a night to remember. Later, when Taylor's prom funds are discovered to be missing, Ryan returns to his old ways by taking matters into his own hands and going to fight Volchok.