Nicholas Baumann is the manager of a Viennese toy-shop that is owned by a Mr. Brown of America. Mr. Brown comes to Vienna to inspect the toy-shop, and Nicholas invites him home to dinner, hoping that Brown will make him a partner in the business. The night of the dinner party, Nicholas' wife Clary becomes so upset with Nicholas' treatment of the family dog that she goes home to her mother. Nicholas explains the situation to his loyal secretary, Anne Weber, and convinces her to impersonate his wife for the evening. Mr. Brown immediately falls in love with Anne, though he can say nothing because he thinks she is Nicholas' wife. Clary comes home during the dinner and, realizing what is happening, pretends to be Anne. The group goes to a nightclub, where the wine gets the best of Mr. Brown. In the end, Nicholas reveals the truth, and gets both the partnership and his wife back. Anne, not to be left out, becomes Mrs. Brown.