Folies Berge, Paris, 1927. Joe Sandilands hurries to the assistance of an old friend who has been arrested for murder. In a cell of the Quai des OrfГїvres, he meets with Sir George Jardine, still in the evening dress stained with the blood of the dead man. The only other witness, a blonde who was sharing the victim's box, has vanished.
Assistance for Joe comes from an entirely unexpected quarter: Francine, a young usherette, clawing her way into the world of the Paris Music Hall. It is she who becomes Joe's guide through this treacherous place, where the killer is sure to be lurking.