Rousseau arrives in Mouthe seeking answers but is drawn into a gruesome mystery instead.

Rousseau ignores warnings and uncovers links between a hooded monk and the killings.

A killer’s call leads Rousseau and Louvetot to Aurelie.

Rousseau suspects Aurelie’s link to the crimes, but she hides a dark obsession.

Rousseau is held captive as Aurelie reveals her crimes and sets her sights on Nikki.

Aurelie’s finale looms as Rousseau and Louvetot seek to save lives and find the truth.