The series tells the story of Carlo Guerrieri, a Roman inspector committed daily to solving cases. In addition to work, the man finds himself raising his daughter Alba, a coroner and police consultant, completely alone. Carlo Guerrieri is a Roman inspector who has really seen it all in his life. Everything changes when Malik Soprani arrives, a young colleague from the Ivory Coast. The boy grew up in Italy and studied at the academy, but his arrival in command will see Inspector Guerrieri in difficulty in dealing with Malik both as a colleague and as a "Roman citizen".