An urgent cry for help brings Hercule Poirot to France. But he arrives too late to save his client, whose brutally stabbed body now lies facedown in a shallow grave on a golf course. But why is the dead man wearing an overcoat that is too big for him? And for whom was the impassioned love letter in the pocket of the overcoat? Before Poirot can answer these questions, the case is turned upside down by the discovery of a second, identically murdered corpse ...