Unaware that the epidemic is developing a second hot-spot, Anne-Marie focuses her energy on finding medication that will help patients. Will she go as far as breaking the law? Françoise is now in contact with Marcellin, a friend of Xavier’s who’s suffering from the same “flu.”

A drop in the number of new cases heralds the end of the epidemic. Will there be a second wave? Anne-Marie is suddenly confronted with several cases of sick people who have had no contact with infected individuals. The team works to solve the puzzle. Sabrina and Juliette sell their first ferret.