While a guest at the rented beach house of a fellow officer and his family, Montalbano discovers the body of Rina, a young woman who had disappeared six years earlier, in a trunk. As he begins his investigation, Montalbano falls prey to a burning passion for the dead woman's twin sister Adriana. She helps him search for the murderer, but, at the same time, she drives him wild, to the point where he unwittingly starts carrying out her plans for vengeance.
