Brenda and Brandon are dateless for the Senior Prom. A school announcement is made that any student caught at Senior Prom drinking, intoxicated or with illicit drugs will be suspended from school and prevented from graduating. Footballer Tony Miller asks Brenda to prom on the day of the event, and Andrea asks Brandon at the last moment after her date, Jordan Bonner, gets ill. Steve takes Celeste Lundey, while Dylan naturally goes with Kelly. Donna doesn't eat all day so that she will fit into her prom dress. She is hit harder by pre-prom champagne than the rest of the gang, appears to be drunk at prom, and ends up collapsing in front of Mrs Teasley.

With 24 hours until graduation, Andrea frets with Brandon over her coming valedictorian speech and her college choice of California University or Yale, as does Brenda with Minnesota. Meanwhile, Dylan gets a windfall when he inherits his trust fund worth $10 million, as well as another surprise visit from his eccentric mother Iris, while he reconsiders his college choice of Berkley or California University. On graduation day, David and Donna are the MCs at the Senior Breakfast gathering while Steve meets with the gang to create something to remember them by.

El día de la graduación, la pandilla recuerda los momentos más memorables de los últimos tres años. Andrea pronuncia su discurso de graduación y todos celebran. Dylan también tiene un misterioso encuentro con su difunto padre, quien le aconseja que no necesita ir a la universidad para demostrarse a sí mismo. En cambio, Dylan le pide a Kelly que haga un viaje por Europa con él durante el verano. Steve también decide ir a la Universidad de California para estar cerca de sus amigos, mientras que Brenda decide regresar a la universidad en Minnesota. La noche de la graduación, todos se encuentran en las colinas de Hollywood, cerca del gran letrero de Hollywood, para crear su logo en el letrero para que toda la ciudad los recuerde por los años que pasaron en West Beverly High School.