Police Inspector Petra Delicato works in the archive department of the Genoa Flying Squad. That is, until the day in which, due to staff shortage, she is assigned her first operational case. She finds herself working alongside the Police Constable Antonio Monte, an old-fashioned, middle-aged man with a rational mind. The polite, old-school widower and the direct, unconventional, two-times divorcee find themselves catapulted into a new world and working together on different cases: a horrific series of rapes in the old city alleyways, the illegal trade of fighting dogs, the strict and harsh world of religious sects, the darkest secrets of the world of television. The crime series is inspired by the character of Detective Petra Delicado, conceived by Spanish author Alicia Giménez Bartlett, but takes place in the Italian city of Genova, instead of the original Barcelona.