A young European, Diego Medina (Carvell), joins the Mexican revolution and becomes a courier for Pancho Villa. He is captured and tortured by the Federales but escapes to the desert where he meets and joins a bandit named Malpelo (Fajardo) and his gang.

Four mercenaries, employed by an African country, are responsible for negotiating a purchase of arms. They seize the sum planned for the negotiations and three of them flee to Spain after having abandoned the fourth in the bush. The latter manages to survive and then finds his accomplices who lead happy life ...