S1, E4: The city of Annecy is locked down. The investigation has confirmed that Milanian is the person who has sent the virus to two of the victims by post. They need to find him. He has crucial information on the strain of the virus he has spread. His daughter, Lily, remains nowhere to be found. Lise and Clovis are on all fronts. Caught day and night by the investigation, it is in their flesh that they will be touched ...