Mousetrap salesmen Stan and Ollie visit Switzerland, believing the country's large cheese output will attract a corresponding number of mice. After being persuaded to sell their entire business for worthless currency, they are forced to work in order to pay off their bill at a hotel. Among the guests is a composer seeking isolation from his opera-star wife, whom he believes will distract him; she arrives at the hotel, takes a job as chambermaid and soon captures the heart of Oliver Hardy...