Rescued from prison on the day the Vietnam War ended, Christopher Walken's McBain vows to return the favour to his liberator, Santos. When Santos's sister (Maria Conchita Alonso) calls in the debt, McBain and other war veterans wash up in Colombia, fighting on the side of the peasants against the drug cartel-backed forces of El Presidente. Despite its violence, the movie is pitched as a sort of an updated send-up of The Magnificent Seven, while in other respects it resembles any old episode of TV's The A-Team. If the peasants don't look especially South American that is because the picture was made in the Philippines.

Santos attempts to lead a people's revolt in Colombia to overthrow the Presidente. When his revolt fails and he is killed, his sister Christina goes to New York to find McBain, a lieutenant Santos rescued during the Vietnam War. McBain agrees to help, recruits his old war buddies, raises some cash by killing a few drug dealers, then leads an attack to topple the Colombian government.