After a home invasion at the Chocolateir Valentin, Livia (7), the owners' daughter, is kidnapped. While Léo Mattéï and his team do everything they can to find Livia and arrest her kidnappers, our investigators discover that behind the magical façade of the chocolate factory lie well-kept family secrets...

After a home invasion at the Chocolaterie Valentin, Livia (7), the owners' daughter, is kidnapped. While Léo Mattéï and his team do everything they can to find Livia and arrest her kidnappers, our investigators discover that behind the magical façade of the chocolate factory lie well-kept family secrets...

Léo Mattéï is called in urgently to deal with an unprecedented situation: three children have disappeared at the same time! He and his team quickly discover that Ambre, Moussa and Florian were playing detective to find Yasmine, who disappeared two years earlier. Did they get too close to the truth before they disappeared? That's what Mattéï will find out in a double investigation full of twists and turns.