It is the year 1850 and the legend of the “Werewolf of Allariz” is spreading fast as more and more mutilated cadavers are pulled out of the forest. Barbara and her sister Josephine live in an isolated house in the forest. They only feel safe when a travelling salesman by the name of Manuel Romasanta comes to visit, but why is Manuel not afraid to enter the forest and what secrets is he hiding? Based on the true story of Manuel Romasanta, who confessed to 13 murders but avoided the death penalty by proclaiming he was a werewolf.