Lord Peter is on vacation when he hears that a dead body has been found at the Wimsey family retreat, and that Lord Peter's brother, the Duke of Denver, is being held for the crime. The dead man? Their sister's fiancé. Lord Peter must clear his brother's name to avoid the death penalty. There is overwhelming circumstantial evidence against the Duke, but Lord Peter firmly believes that his brother is innocent and begins his own investigation into the murder. Can Lord Peter find the truth in time to save his brother and the family name?