"Death of a Cad" is a mystery novel featuring the beloved amateur sleuth, Lord Peter Wimsey. Set in the 1920s, it begins when the body of a young officer is discovered at a remote Yorkshire estate, causing a stir in the local community and among the aristocracy. Lord Wimsey, with his keen intellect and penchant for solving puzzles, takes it upon himself to investigate the matter, uncovering a web of secrets and hidden motives among the house's inhabitants.