Dr. Leo Drayfus is a respected dentist. When his self help book addicted wife Connie informs him that his sister and her new boyfriend are coming to stay with them for a few days, Leo is less than happy about the idea. The situation goes from bad to bizarre when Leo's sister shows up engaged to Mike, a professional mime who will not drop the act. Fearing for his sanity and his reputation, Leo becomes selfishly obsessed with making Mike drop character, dump his sister and get out!