A lone rider arrives in a small high mountain village; nobody knows where he is from and nobody wants him there. Greider (Sam Riley - On the Road, Byzantium, Control) is met with scepticism and paranoia and is reluctantly offered shelter for the harsh winter ahead. The village, cut off by snowfall with barely a ray of sunlight reaching the valley through the winter months is a bleak, isolated and lawless place. When a tragic accident leads to the death of an elder's beloved son, suspicion is raised. When another son is mysteriously killed, it's clear this is not a coincidence, and this visitor carries a dangerous and deadly secret with him.