Surprised, if not dismayed, to discover from his superior, Vice-Questore Patta, that leaks are emanating from the Questura, Commissario Guido Brunetti is surprised more consequentially by the appearance of a friend of his wife's, fearful that her son is using drugs and hopeful Brunetti can somehow intervene. When Tullio Gasparini, the woman's husband, is found unconscious and with a serious brain injury at the foot of a bridge in Venice after midnight, Brunetti is drawn to pursue a possible connection to the boy's behavior. But the truth, as Brunetti has experienced so often, is not straightforward.