New York dilettante Philo Vance decides to assist the police in investigating the death of another man-about-town because he finds the psychological aspects of the crime of interest, and feels that they would be beyond the capacities of the police, even those of his friend District Attorney Markham. Vance investigates the circumstances under which the body was found and reconstructs the crime sufficiently to determine that the murderer is five feet, ten and a half inches in height. Together, Vance and Markham investigate Benson's business associates and romantic interests until Vance manages to pierce the murderer's alibi for the time of the murder and force a confession.

The beautiful Margaret Odell, famous Broadway beauty and ex-Follies girl known as "The Canary", is found murdered in her apartment. She has a number of men in her life, ranging from high society to gangsters, and more than one man visited her apartment on the night she dies. It is Philo Vance's characteristic erudition that leads him to a key clue that allows him to penetrate a very clever alibi and reveal the killer. "The strangeness, the daring, the seeming impenetrability of the crime marked it as one of the most singular and astonishing cases in New York's police annals; and had it not been for Philo Vance's participation in its solution, I firmly believe it would have remained one of the great unsolved mysteries of this country.

Philo Vance takes a hand when, one evening, a daughter of the Greene family is shot to death and another one is wounded.