Playwright Monsieur Feydeau is staying in the Parisian Hotel Paradiso. He needs to write a new play, but has writer's block. He takes the opportunity to observe his fellow guests: Monsieur Boniface, henpecked by his domineering wife, and Marcelle, the beautiful but neglected wife of Henri, a building inspector. Henri is sent to the hotel to investigate rumours of ghosts (which turn out to be caused by drains). However, the hotel is the trysting place of Marcelle and Boniface, who are having an affair. Family friend Martin shows up with his little daughters, but there isn't enough room at Boniface's place for the entire family. Martin overhears the name of the hotel, and checks in with them there. In the somewhat rundown 'by-the-hour' hotel, there are two husbands and one wife, plus Henri's nephew and Boniface's maid, who are also having an affair. The little girls, responding to a "spooky" atmosphere in their room, sing a chant about witches while waving bedsheets, frightening Henri and other guests into thinking the ghost rumor is true. Marcelle and Boniface's affair is severely compromised (not least by a police raid). All these events provide Feydeau with the material for his play, which becomes the
succès fou of the next season. ==Cast==