 The boyfriend (Cantinflas) of the servant of a rich industrial man, gets into the house in order to kill a mad dog. Suddenly this man appears so the servant tells him that Cantinflas is his wife s brother (Leonardo), who had been lost for years. The rich man then remembers that his father in law s testament could only be paid when all brothers get together, so treats Cantinflas, a real bum, as a king.