1915, the Cabrach. In the fierce, wild beauty of this remote corner of Scotland, an isolated community makes a discovery: an ancient body in a peat bog, perfectly preserved.

Two people haul the body from the ground: Lizzie, the wife of a wealthy local landowner, and Johnny, a nomadic singer and farm hand.

Soon afterwards, strange events begin to occur. At hearthside and inn, people whisper: what have we unearthed?

As tensions run high and men leave for war, old fears and secrets emerge. But in a place where judgement is swift, who is truly without sin?