When two young lovers crash their car into a ravine in the remote mountains of Wales, they are plunged into a lost world. Dragged from the river by a mysterious figure, they are taken to a ramshackle farm, a place untouched by time. As events unfold we learn the explosive truth about the young couple's past. More unsettling still, we discover the ghostly truth about Stanley, and the tragedy of the valley he once called home.
Despite nothing overt occurring, there is a creeping sense of otherness about the whole situation, and it's precisely this lingering lack of certainly that makes the film so compelling.