Laurène stumbles on a surreal crime scene near a piano in the forest. Cora searches for clues to Roman's fate. Garnier digs up info on Siriani's past.

As Laurène desperately tries to escape the ravine and get help for Teddy Bear, memories of her kidnapping surface. Siriani makes a troubling discovery.

With the squad hobbled and the Celtic day of the dead looming, Laurène begs a commander for reinforcements. Dogs lead the way to another body.