A vain actor, his best friend, and an activist end up at a mutant freak farm run by a weirdo scientist.

A nice guy has just moved to New York and discovers that he must share his run-down apartment with a couple thousand singing, dancing cockroaches.

High school misfits Stoney and Dave discover a long-frozen primeval man buried in their backyard. But the thawed-out Link—as the boys have named him—quickly becomes a wild card in the teens' already zany Southern California lives. After a shave and some new clothes, Link's presence at school makes the daily drudgery a lot more interesting.