In a cave an ancient and mysterious rite is about to be performed. Seven girls will be sacrificed to grant another life to the thousand-years-old alchemist Felix. Only the off-duty cop Paul and a deaf-mute teenager Lara could save them from that tragic fate.

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.