 Harry (Jack Lemmon) is a barely functional human. He meets an old friend who is having marital problems as Harry is about to leap off of a bridge. His friend (Peter Falk) decides that Harry is the man to take his wife (Elaine May) away from him so that Falk can be with his girlfriend. May and Lemmon have an instant attraction and in a short while Lemmon is wearing Falk s suits and Falk is free. But, May soon discovers that Lemmon is the world s worst roommate.