Morgane and Timothée spend a night together - but instead of clarity, this only brings new confusion. But there isn't much time to think, because the team is called to a crime scene: Yvan Desfard has been discovered dead on the side of the road. The investigation is complicated by the fact that the victim was part of a secluded hermit community. While Morgane tries to solve the complex case, she struggles with the question of what to do next with Timothée.

While Morgane and her children are still puzzling over what to do with the mysterious bundle of money behind the dishwasher, 19-year-old Salomé Rousseau is discovered dead in a dissecting room. The case quickly becomes unusual, as all the clues point to a disturbing scenario: Was Salomé a vampire? This sounds absurd to Morgane - and she sets out to find a rational explanation for this bizarre case.