Paris, 1937. Winckler kills his enemy Gordon, a Chicago mobster, from the stage of a Parisian music hall, where he performs telepathy. He pays another artist, Helene, so that she tells the police they've spent the night together, which doesn't fool Callas, the police officer who investigates the murder. He hires one of his fellow officers in order to seduce Helene.

Mathias Pascal, saddled with a stupid wife and a nagging mother-in-law, leaves home and is extremely lucky at several gambling resorts. He returns home and discovers that a drowned man, fished out of the river, bears an uncanny likeness to him and is being buried by his family as him. This, to him, is a pleasant turn of events and he goes to Rome, where he falls in love with Louise Paleari. Count Papiano, a jealous suitor of Louise's, threatens him with arrest unless he produces credentials to prove his identity.

Michel Piccoli plays a police inspector whose best friend is murdered on the orders of gang boss Charles Vanel. The inspector knows full well that Vanel is too crafty and well-connected to ever stand trial for his crime, so he carefully lays a subtle trap for his adversary. Unfortunately, both Piccoli and Vanel are thwarted by a pair of scheming females.

Frank, a hobo, ends up in a garage-truck stop in the middle of nowhere. Nick Marino, its older, kind and naive owner, is married to Cora, a sexy and mercenary woman half his age. Frank, although not a fan of hard work, accepts Nick's offer to work for him. Of course, it is not for Nick's sake that the young man becomes his attendant, but for the love of Cora under whose spell he has fallen at once. It does not take long before Cora, who despises her husband, asks her lover to help her get rid of him. Frank is reluctant at first but ...