Raoul Leduc is a police inspector trailing a spy who plots to kidnap an important American atomic scientist. Joe Victor a gangster who is hired to carry out the abduction, balks when he learns what is at stake and helps Leduc out instead.

Eddie Darrow, seeking a mobster's widow in Macao, gets involved in a casino owner's affairs.

Gentleman gangster Max and his partner, Riton, pull off their last, most successful heist and find themselves comfortable enough to retire in the style they enjoy. However, Max confides the details of the theft to his younger mistress, Josey -- who has secretly taken up with ambitious young rival gangster Angelo. Angelo then has Riton ...

During World War II, an American serviceman in London decides to impress his English girlfriend by acting as an American gangster, which soon turns deadly.

A small-time hood shoots his way to the top, but how long can he stay there?