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
After Doug picks up hitchhiking Rosco with his truck, they are mistaken for two bank robbers by the traffic police. They manage to escape only to be confused for two secret agents while trying to take a flight at the airport.
Island farmer Banana Joe helps the local community by trading his bananas for goods. When gangsters arrive with plans to construct a banana processing plant, Joe kicks them out, but the mob boss discovers that Joe is operating without a license. After the mob tips off the authorities and Joe's boat is impounded, he ventures into a big city for the first time to seek help.
