When Montalbano comes to the aid of his new neighbour, Liliana Lombardo, after the engine of her car is interfered with, the inspector can little imagine where this innocuous event will lead. It soon transpires that the young woman - beautiful, intelligent and rather vague about the whereabouts of her husband - is being targeted by someone with a grudge against her. But is Liliana's growing interest in Montalbano simply a product of the detective's innate charm? Or is she trying to lead him astray - and into trouble?
Meanwhile the inspector finds himself drawn into another mystery when a bomb explodes outside an empty warehouse in Vigata. But who was the bomb intended for? And why was it left in such a peculiar place? As Montalbano and his colleagues investigate the street's residents - some of whom have suspicious mafia links - they begin to receive a barrage of false clues from an anonymous source.
As Liliana's behaviour becomes increasingly erratic and leaks around the case threaten Montalbano's reputation; the sense of danger grows. The inspector soon realizes that, with this investigation, he is being led into a hall of mirrors, where there is danger at every turn and nothing is quite clear...