Amalgamated Dairies hires David Rutherford, an FBI man turned industrial saboteur, to investigate a popular new product called “the Stuff,” a new dessert product that is blowing ice cream sales out of the water. Nobody knows how it’s made or what’s in it, but people are lining up to buy it. It's got a delicious flavor to die for!

In Miami, Florida, biker gang leader Edward "Diablo" Santer is about to be executed for murder when he proclaims his innocence and vows revenge from the grave. When a mysterious biker comes to town during Spring Break festivities, leaving several teenagers electrocuted to death, some begin to suspect that Santer has made good on his promise.

A nerdy teenage scientist discovers a formula for invisibility, and uses it to take revenge on all those who have wronged him--and also to spy on the girls' shower room.