When Steven Kovacs orders cable TV for his apartment, he has no idea how much he'll regret it. That's because the installer sent to his home is Chip Douglas, a lonely, lisping, parasitic geek, who just might be psychotic. Chip immediately bonds with vulnerable milquetoast Steve -- and then refuses to leave him alone. Chip's wild behavior proceeds to make his victim's life a living hell, and even jeopardizes Steve's attempt to reconcile with his girlfriend.