It was shortly after his 12:30 appointment that Dr. Morley was found with a bullet through his right temple. The gun was on the floor beside him. The authorities were satisfied that the amiable old dentist had shot himself. Hercules Poirot was not. But who could have murdered him? One of DR. Morley's glamorous patients? His hard-drinking partner? His secretary's disgruntled boyfriend? All Poirot has is a hunch, too many clues, and a killer who will not be satisfied with only one victim.