A corporation building a highway through the rainforest hires a gang of mercenaries to get rid of the local Indians, who don't want the highway built through their lands. The mercenaries resort to murder, massacres and enslavement to rid the company of its Indian problem. Sgt. Irons, a former Marine NCO, helps to unite the jungle tribes and leads them in their fight to protect their homes and their families.

A half-breed Marine takes on greedy industrialists in the Amazonian rain forests. Marvelous Marvin proves his ability as a fighter!