At the opening of The Debonair Key Club, a Playboy-like nightclub/restaurant, Debonair Magazine founder Alex Debbs is found stabbed. The suspects are all connected in some way with the Debonair empire, both the club and the magazine: Debbs' main business partner, an embittered cartoonist, a swinging joke writer, a blackmailed princess, a folk guitarist, one of the Key Club girls, and a reclusive heiress. After an attack on Tim, another murder and the breaking of ""unbreakable"" alibis, Burke solves the case.