NATIONAL BESTSELLER OF FRANCE. THE SECRET OF FORTY YEARS OF AGE.

A respectable elderly woman emerges from the pool of an expensive resort. Suddenly her eyes widen and her nerves stretch like strings: she saw a man and recognized him. The woman watches him return to his bungalow. Then she runs to her room, grabs a large kitchen knife and knocks on the man's door. And when he opens it, she rushes and begins to furiously beat him with a knife... When she is arrested, she does not say a word. Doesn't answer any of the investigator's questions. Complete silence... Refuses to speak even with his son Theo. Knowing his mother, he understands that this outburst of rage cannot be explained either by a mistake or by a clouding of reason. This is something completely different... Theo learns that the victim of the attack is a famous doctor from Switzerland. He travels to Lausanne, but what he finds is not at all what he expected. And this discovery will change his whole life...