A group of young professionals decides to play a practical joke on one of their ex-girlfriends who married a rich man who is about to close a major real estate deal. They plan to kidnap her and mess up the deal. Unfortunately, the joke becomes deadly serious.

A man tries to uncover an unconventional psychologist's therapy techniques on his institutionalized wife, while a series of brutal attacks committed by a brood of mutant children coincides with the husband's investigation.