Winterfall Farm, spectacular and remote, stands over Bodmin Moor. Wanting an escape from the constraints of conventional life, Kit and Tara move to the isolated smallholding with their daughter, Skye, and a group of friends. Living off-grid and working the land, they soon begin to enjoy the fruits of their labour amid the breathtaking beauty and freedom of the moor.

At first this new way of life seems too good to be true, but when their charismatic leader, Jeremy, returns from a mysterious trip to the city with Dani, a young runaway, fractures begin to appear. As winter approaches, and with it cold weather and dark nights, Jeremy's behaviour becomes increasingly erratic. Rules are imposed, the outside world is shunned, and when he brings a second girl back to the farm, tensions quickly reach breaking point with devastating consequences…