A high-society prank at a London nightclub spirals into a lethal investigation when a musician dies under suspicious circumstances. Inspector Roderick Alleyn must navigate the social posturing of the elite and the theatrical nature of the crime to uncover the truth behind the death. While witnesses are convinced of the culprit's identity due to the public nature of the act, Alleyn identifies inconsistencies that suggest a more calculated deception. The narrative follows the methodical, observational style characteristic of the classic detective genre, focusing on the interplay between the eccentric suspects and the cool-headed investigator.

This work is widely regarded as a quintessential example of the Golden Age detective novel, showcasing the author's skill in blending theatrical flair with rigorous procedural logic. Readers often highlight the sharp, witty dialogue and the intricate construction of the central puzzle as the primary strengths of the narrative. The character of Inspector Alleyn is frequently praised for his understated authority and his ability to remain composed amidst the chaotic behavior of the suspects. The book maintains a reputation for its clever subversion of witness testimony, which keeps the reader engaged until the final revelation. As a staple of the genre, it continues to be valued for its polished prose and its effective capture of a specific social milieu.