The film is about a college professor who invents a revolutionary flying rubber, which he dubs ‘flubber’. However, a nefarious alumnus businessman wants it for himself.
The film centers on Lee Marvin and John Vernon are partner are about to rob a huge of money. One day, because of the loot, Vernon decides to shoot Marvin. After two years, Marvin comes back and is eager to revenge.
Doc and Wishey run into some Nazi-agents, who want to smuggle bombs into the USA from a Mexican border hotel.
A pair of bus drivers accidentally steal their own bus. With the company issuing a warrant for their arrest, they tag along with a playboy on a boat trip that finds them on a tropical island, where a jewel thief has sinister plans for them.