Solitary and tenacious inspector Petra Delicato solves crimes on the front line.

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.—Canon y mus