Plot

Jacques Darnay exits prison after 10 years for a jewel robbery with missing diamonds. The jeweler's death is unresolved. Police, former accomplices investigate while Darnay conceals his motives.

Jacques Darnay (A. Delon) is caught and convicted of stealing diamonds and the murder of a jeweler. Although not guilty, the prisoner has served eight years. The jewels are not found so Jacques, after his release from prison, follows Inspector Rouxel (P. Mondy), and other criminals who are interested in where the prey.