Lynton Hora, the Commandatore, exerts manipulative influence over his household, including Myra and his son Guy, steering Guy toward daring thefts. The narrative traces Guy's induction into crime, small schemes escalating into major robberies and the shaping effects of a moral philosophy that rationalizes theft. Interwoven are Myra's fears and compromises, character studies of associates like Cornelius Jessel, and the Commandatore's cold calculations. Inspector Kenly's investigation and mounting clues provide a procedural counterpoint and build toward confrontations, a final theft, and a decisive parting of ways. The work examines temptation, duty, and the costs of criminal ambition through suspenseful episodes and reflective interludes.