A stiff German professor inherits a house in Montevideo, Uruguay.
Several oil companies are trying to get hold of Prof. Wilkens, who has discovered a revolutionary formula for a new type of fuel that will put all the oil companies out of business and control the world's economy.
After a truck carrying a cargo of narcotics is held up by rival smugglers, the driver sets out to prove his innocence.
Popular cheeky character from 19th century German literature, Bonifatius Kiesewetter, is a magnet for the ladies, but he has his eyes set on the Baroness, her daughters and her estate.