Nicole Villiers

Jacques Mervel, also known as "L'Homme de la Jamaïque" makes use of his talents as a gun runner in Tangiers, Morocco. After triumphing over a rival gang, he decides to quit the job and to start a new life with Vicky, a pretty young nurse. In Paris, a doctor lets him know that he is affected by leprosy. In desperation, Jacques runs away from Vicky to spare her. When she realizes the reason why Jacques has disappeared from her life, she joins him with a view to helping him fight the disease.

An accordionist playing in disreputable halls is mistaken for a gangster by a special envoy from the American crime syndicate in charge of investigating the French milieu. The American will prepare a hold-up with a gang of women specialized in scamming tourists. But the accordionist will make the hold-up fail and all the criminals will end up behind bars.