On the plane from New York to London, Dr. Morelle chances to meet Edwin Gale, a smooth-tongued swindler. Inexplicably, Gale finds himself drawn to the famous psychiatrist-detective, and so begins one of Dr. Morelle's most intriguing cases. Back in London, the Doctor encounters Edwin Gale again, and, as a result, finds himself involved in the dark machinations of Dolores del Robia, who's as evil as she is lovely. When Dolores is found strangled to death, Dr. Morelle must investigate a maelstrom of violence to unmask the murderer...

Another classic crime tale in this popular and long-running series!