When Edmund Ibbs, a young lawyer, defends a woman accused of shooting her husband dead, he finds himself drawn into a web of conspiracy and murder. Soon, Ibbs himself is accused of complicity in a killing, when a corpse unexpectedly appears as part of a magic act in a crowded theatre. Also present is Joseph Spector, former illusionist turned highly respected amateur sleuth. Spector begins to investigate the mystery, but when a second body is discovered later the same night, all the evidence points to Ibbs being guilty. With a host of hangers-on having something to hide, can Spector find the true culprit, or will he and Inspector Flint of Scotland Yard conclude that Ibbs is guilty after all?