When a man's body is discovered in the small resort town of Hari Cove, the police at first suspect a tragic accident. However, when the victim is found to have been a former policeman and that the cause of death was actually carbon monoxide poisoning, they begin a murder investigation. Manabu Yukawa, the physicist known as 'Detective Galileo', soon finds himself drawn into the case. The latest mystery from the million-selling cult Japanese author.