Salvatore Basile

Alan gets a map to some war treasure which the Japanese army left behind on a small Pacific island at the end of World War II. But some gangsters try to steal the map from him and so he hides on Charlie's boat which just leaves the harbor. He manipulates the ship's compass so that Charlie is not aware that he is sailing to the treasure island. But when they step on the island, they discover that it is not as abandoned as they believed: there are some natives - and a Japanese soldier still defending the treasure

Bud Spencer plays Banana Joe, a brawny yet friendly man who lives in a small rainforest village called Amantido with a huge number of his own children and regularly delivers bananas to a South American river port (hence his name). One day, the henchmen of a local gangster boss named Torsillo come ashore in Amantido to initiate the construction a banana processing plant. Of course, Joe (in typical direct-approach manner) evicts the goons, who promptly return to their boss. Torsillo finds out that Joe is trading bananas without a license and decides to exploit it. Upon his next delivery, Joe is apprehended by the police and given the choice of either acquiring a legal license or getting his boat taken away and himself arrested for illegal shipment. Joe travels to the nearest city, which to him is a new world, as he grew up in the rainforest.

A New York University professor returns from a rescue mission to the Amazon rainforest with the footage shot by a lost team of documentarians who were making a film about the area's local cannibal tribes.