Don Matteo is a thoroughly ordinary Catholic priest with an extraordinary ability to read people and solve crimes. He’s a parish priest who never met an unjustly accused person he didn’t want to help.

The story of the first ever "anti-mafia judges pool" established in the '80s at the Palermo Courthouse, in Sicily, in the '80s, while two mafia families started a 10-year-long war to obtain the complete control of smuggles.