The Hellcats are an all-female gang bent on bucking authority at their high school. New student Joyce moves into the neighborhood and quickly draws their attention. Desperate for acceptance and unhappy with her home life, she becomes close to the Hellcats and begins drinking, dancing and meeting boys. Can Joyce's parents stop her descent into depravity?

Chip is killed accidentally while trying to rape a blonde girl, who runs. Silver becomes the number one suspect even though she has an alibi, but due to previous brushes with the law she's sent to Girls Town, a home for young women in trouble with the law which is run by nuns. Silver is rebellious and causes trouble at the school, and her friend Sarafina totters near the brink of self-destruction because of an infatuation with a young singer. Meanwhile Chip's father hires a detective to find out the truth, and Chip's friend Fred gets Silver's sister in trouble at a drag race. Silver has a lot of problems all right.

A troublemaker returns to town only to find his old tearaway pals have joined a supervised motorcycle club. Friction erupts between him and the new leader about this goody-goody setup, and about the charms of gang moll Terry.

The long-lost father of a frigid, uptight Freudian psychologist contracts a wealthy American playboy who owes him a favor to woo his daughter.

Mike, a biker, returns to California after serving in Vietnam. He uses his war-hero experience to organize a new, united super outlaw gang. When one member is shot by police because he killed a girl at a pot orgy, an all-out cop vs. biker war results.