A retired police detective and a young amateur sleuth team up to find a serial killer who's resumed a killing spree in Turin, Italy after a 17-year period.A retired police detective and a young amateur sleuth team up to find a serial killer who's resumed a killing spree in Turin, Italy after a 17-year period.A retired police detective and a young amateur sleuth team up to find a serial killer who's resumed a killing spree in Turin, Italy after a 17-year period.