A doctor's life takes a mysterious turn when his ambulance plunges into a river.

Lorenza is 30 years old and has not yet found the man of her life. Not wanting to be alone, she decides to take the penniless Riccardo as her husband "for rent".

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.