"Around one a.m. on an early spring morning, two teenage gangs are arrested after clashing violently in one of Venice's squares. Commissario Claudia Griffoni, on duty that night, perhaps ill-advisedly walks the last of the boys home because his father, Dario Monforte, failed to pick him up at the Questura. Coincidentally, Guido Brunetti is asked by a wealthy friend of Vice-Questore Patta to vet Monforte for a job, triggering Brunetti's memory that...