A group of friends on a weekend getaway are caught between a hulking serial killer and one of their own possessed by a recording of an ancient ritual.

Matthieu is a 33 year old Parisian who finds out that the father he never knew has died and decides to go to his funeral in order to meet his two siblings in Quebec. But once in Montréal, he realizes that nobody is aware of his existence or even interested in it. He is alone, in hostile territory…