 Having his job as a tweed tailor, Alex Ponttin (Michel Serrault) has devised a novel way to keep himself in touch with society. He admits himself into people s homes, by pretending to be a relative or an official, and persuading his victims to give him a night s free board. With his disarming, amiable personality, he is rarely refused. So he visits the vulgar Dumont (Jean-Pierre Bisson), the nymphoman Marie Wileska (Marie-Christine Barrault) and he stays at the shy lesbian Caroline Winberg (Claude Jade). Alex helps Caroline in conflicts with her quarrelsome girl-friend Gloria (Corinne Le Poulain) and he rescues Caroline s inheritance. The homeless Alex is chased by Commissaire Bruneau (Jean-Claude Dreyfus). Fortunately, the police officers investigating the case are so terminally stupid that Alex has little chance of being arrested...