The legend of Yamashita's Gold lures a treasure hunter and his group deep into the Indonesian jungle. Once they are trapped in an abandoned World War II Japanese bunker, they face the terrifying reality that the only way out is to go further in.

Un agente segreto statunitense, Sparks Moan, viene infiltrato nell'equipaggio di una banda di criminali, guidati dall'ex mafioso Renzo Capetto, che si sono offerti di accompagnare un gruppo di militari fuori da Cuba insieme ad uno scrigno di cassa. I criminali però hanno intenzione di tenere lo scrigno per loro ed organizzano una messinscena con un falso mostro marino che avrebbe dovuto uccidere i militari. Ma un vero mostro marino comincia a seguire l'imbarcazione.

A ship's captain in the South Seas battles a villainous pearl trader who uses island natives as slaves for his business.

Bleeding to death under a dead tree in the middle of the prairie, he lies there, old Sam, when the gunslinger Tom finds him. In his final words, he talks about the legendary gold of the Iowa Indians that he had actually seen in the blue mountains – from which no pale face has yet returned alive. When two Indians appear on the horizon, Tom searches for space – and so the Iowas bring the corpse of Sam, popular for his stomach-turning firewater, to his son Bill. It is assumed that a bear killed him, but doubts soon arise about this theory.