Alain Lefevre is a boxer paid by a Marseille mobster to take a dive. When he wins the fight he attempts to flee to America with the mobster's girlfriend Katrina. This plan fails and he seeks escape by joining the foreign legion. As part of the legion he tangles with abusive lieutenant Steinkampf and bonds with legionnaires Luther, Mackintosh and Rosetti. The mobster discover his whereabouts and enrolls two hitmen to finish him off. With their fort under siege and enemies within, Lefevre finds...

Lyon Gaultier is a deserter in the Foreign Legion arriving in the USA entirely hard up. He finds his brother between life and death and his sister-in-law without the money needed to heal her husband and to maintain her child. To earn the money needed, Gaultier decides to take part in some very dangerous clandestine fights.