The disease continues to spread silently. For now, Anne-Marie has other worries. She sets out to prove to the Minister that her lab is effective. She’s still hesitant to confront Marc. Françoise organizes a celebration for Xavier. It’s a small gathering – with immense consequences.

Nelli tells Anne-Marie that a strange illness is affecting people she’s close to. Anne-Marie initiates an investigation into the deaths of the two homeless people. The young girl infected by Nelli’s cousin risks infecting others. In the lab, the arrival of a new staffer affects Anne-Marie’s work.