Digging for peat in the mountain with his Uncle Tally, Fergus finds something that makes his heart stop. Curled up deep in the bog is the body of a child. And it looks like she's been murdered. As Fergus tries to make sense of the mad world around him - his brother on hunger strike in prison, his growing feelings for Cora, his mam and da arguing over the Troubles - a little voice comes to him in his dreams, and the mystery of the bog child unfurls.