A high-stakes London production of Macbeth descends into chaos when a series of gruesome pranks and a real-life murder force Chief Superintendent Roderick Alleyn to investigate the theater company. Alleyn must navigate the complex social dynamics and superstitions of the cast and crew to identify a killer hiding behind the mask of performance. The narrative follows a classic procedural structure, utilizing Alleyn's methodical observation to peel back layers of professional jealousy and hidden histories. As the rehearsals progress toward a fatal conclusion, the tension between the staged drama and the actual crime creates a claustrophobic atmosphere within the theater walls.

This novel is widely regarded as a quintessential example of the Golden Age detective tradition, showcasing Marsh's deep familiarity with the theatrical world. Readers and critics often highlight the clever integration of Macbeth's dark themes into the mechanics of a modern murder mystery. The characterization of the theater company provides a rich backdrop that enhances the central puzzle, making the setting as vital as the crime itself. While some may find the procedural elements deliberate, the consensus points to a tightly plotted narrative that rewards those who appreciate classic whodunit structures. The work remains a staple for fans of the genre who value both intellectual rigor and atmospheric storytelling.