Before he can graduate, cocky high school student Michael Corben (Richard Grieco) travels to France on a school trip to earn a missing French credit. But when a British intelligence agent mistakes Michael for a spy of the same name, they rush him to headquarters and assign him to capture the evil Augustus Steranko (Roger Rees), using a plethora of espionage gadgetry. Michael has the time of his life — until he crosses paths with two assassins (Tom Rack, Carole Davis) who want him dead.
This coming-of-age film follows the mayhem of a group of rowdy teenagers in Austin, Texas, celebrating the last day of high school in 1976. The graduating class heads for a popular pool hall and joins an impromptu keg party, however star football player Randall “Pink” Floyd (Jason London) has promised to focus on the championship game and abstain from partying. Meanwhile, the incoming freshmen try to avoid being hazed by the seniors, most notably the sadistic bully Fred O’Bannion (Ben Affleck).
Lovely teen Julie Richman (Deborah Foreman) is steeped in the excessive, pink-clad culture of the San Fernando Valley, complete with her narcissistic boyfriend, Tommy (Michael Bowen). At a party, however, Julie falls for an edgy Hollywood punk named Randy (Nicolas Cage), and the two begin an unlikely romance. Torn between fitting in with her superficial friends and embracing a more non-conformist lifestyle, Julie ultimately has to decide to stay with Tommy or take a risk with Randy.
With the occasion all but overshadowed by her sister’s upcoming wedding, angst-ridden Samantha (Molly Ringwald) faces her 16th birthday with typical adolescent dread. Samantha pines for studly older boy Jake (Michael Schoeffling), but worries that her chastity will be a turnoff for the popular senior. Meanwhile, Samantha must constantly rebuff the affections of nerdy Ted (Anthony Michael Hall), the only boy in the school, unfortunately, who seems to take an interest in her.
High school wrestler Louden Swain (Matthew Modine) feels he must do something significant in his life shortly after turning 18. Despite vehement advice against it from his father (Ronny Cox) and coach (Charles Hallahan), Swain decides to try to lose over 20 pounds in a very short time in an attempt to take on the defending state champion of a lower weight class. Meanwhile, he falls for the edgy, older Carla (Linda Fiorentino), who provides further distraction for the young wrestler.
In this zany sequel, time-traveling duo Marty McFly (Michael J. Fox) and Dr. Emmett Brown (Christopher Lloyd) return from saving Marty’s future son from disaster, only to discover their own time transformed. In this nightmarish version of Hill Valley, Marty’s father has been murdered and Biff Tannen, Marty’s nemesis, has profited. After uncovering the secret to Biff’s success — a sports almanac from the future — Marty and the Doc embark on a quest to repair the space-time continuum.