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.

Coliandro is an inspector serving at the Bologna police headquarters who constantly finds himself embroiled, against his will, in matters bigger than himself. But Coliandro never backs down, even though his carelessness and investigative incompetence inevitably land him in trouble.

A group of young archaeologists flies to Mexico to study the Mayan culture, but they find trouble when they stumble upon an unknown cursed temple.