There's a corpse in the bathtub, wearing nothing but a pair of pince-nez spectacles. Enter Lord Peter Wimsey, the original gentleman sleuth. Urged to investigate by his mother, the Dowager Duchess of Denver, Lord Peter quickly ascertains that the sudden disappearance of a well-known financier is in some way connected to the body in the bathroom. But discovering exactly which way they're related leads the amateur detective on a merry chase.