Raymonde suspects her husband, Victor Emmanuel, of infidelity and she turns to her best friend, Lucienne, to help her gain proof. They concoct a play - based on a perfumed letter - to trap him at the Hotel Coq d'Or in Montretout. In true Feydeau fashion the plan misfires; the plot is complicated by confused identities, revolving beds, a great many doors and the fact that the stupid hotel porter, Poche, is the exact double of Victor Emmanuel. Period: the early 1900s.