Under Notzing's orders, the brigade disposes of sarcophagi at the town crematorium. Franck Valette, the center employee, finds a mysterious book that resisted the flames and brings it to his brother Charles, who works at the museum.

Sarah and Franck meet Elisabeth Brann, a theologian. According to her, Charles provoked the arrival of the horsemen of the apocalypse whose mission is to destroy the pillars of contemporary society.