Raphaëlle finds herself in the emergency room, between life and death, while a famous ghost-hunting YouTuber is found dead at home, crushed by a mysterious force. Between paranormal experiences and high-end scams, the investigation gradually leads to the trail of a mysterious medium nicknamed Odin. How is he connected to this sinister affair? And above all, how will Raphaëlle get out of it?

Raphaëlle has emerged from her coma, but her legs remain paralyzed. The investigation into Odin leads Astrid and Nicolas Perran to investigate a strange boarding school, Overlook College. While investigating within its walls, the investigators soon discover that the suspicious death of a student at the school is curiously linked to that of their first victim. He may not have succumbed to meningitis, but may have been poisoned...

A bloody African statuette is found near the lifeless body of Adrien Dorval, a 65-year-old retired engineer who had opened a pottery workshop. The medical examiner notes that the victim's torso was slashed post-mortem. Strangely enough, the statuette is not the murder weapon. Adrien Dorval was actually killed with a clay roller found in a trash can near the crime scene. The investigation gradually puts Astrid and Raphaëlle on the trail of a Machiavellian revenge. The police officer and the librarian are in for a surprise. Raphaëlle also fears being shelved.