S1, E1: Lise Stocker and Clovis Bouvier have to face a new and totally baffling threat. What was supposed to be a simple boating accident turns out to be more complicated than what they expected. The man who died on his boat suffered a bleeding of rare intensity. All of his organs have exploded. The case gets even more complicated when a second body with the same symptoms is brought to the Annecy hospital: the nape of the neck covered with black mottling, fever, internal bleeding. What's going on in the city? Who is poisoning people?