Gloria wakes up one morning in her attic with yet another boyfriend at her side, Fuffi. Unfortunately Fuffi is not called Fuffi, but Franco and is the husband of his best friend, Marta. Upon finding out, Marta threatens to leave home unless Franco in turn agrees to be betrayed. And in order not to lose his wife Franco accepts. But who will be the wife's lover? Roso from jealousy Franco begins to investigate and begins to put together an identikit of the alleged lover: he smokes a pipe, wears a beret, has a tennis racket and even a halberd. But who will it be?