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.

Blanca Ferrando is a young woman who became blind at the age of twelve, due to a dramatic fire in which her older sister Beatrice died and which was caused by her violent boyfriend, Sebastian. This tragedy made her develop a very strong sense of justice to the point of pushing her to join the police. Blanca is helped by her most trusted friends: her guide dog Linneo, a female bulldog who protects and comforts her in the most difficult moments, and her beautician friend, Stella. After overcoming her work challenges, she finds herself facing sentimental ones: torn between two men, Inspector Michele Liguori, a man of many secrets, and Nanni, a young cook.

A group of friends on the threshold of adulthood are going to a party. Stuck in traffic, they decide to make a stop. But the neglected place they find themselves in evokes in Mattia an ancient feeling that will make him plunge into his own self.