An old librarian, Professor Columbus, wants to go to the sea once in his lifetime. So he buys a big ship and takes a boat trip across the North Sea to London, accompanied by a bunch of stoned hippies, and chased by the police.
Munich cab driver Herbert Sponer picks up American businessman Jack Mortimer at the train station. Suddenly Mortimer is shot while driving and Sponer has to try to avoid being suspected as the perpetrator.
