The full moon leaves the city bustling. Hermann struggles with ghosts from the past, and Siriani does not miss out on the opportunity to inspect the quarry.
Laurène finds a surreal crime scene, entitled to a piano in the middle of the forest. Cora tries to figure out what the end of Roman was. Garnier investigates Siriani's past.
When animal bones begin to appear in Villefranche, Laurène and Bertrand set up a team to search the forest, and the Children of Arduinna prepare their attack.