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. Alain is a boxer in 1925 Marseille, France. When he doesn't take the dive paid to take by a mob boss, he has to split. He joins the Foreign Legion and is sent to Morocco. He makes 3 friends and they watch each other's backs.