Ash’s dad has returned from war, close to a breakdown and lost in a world of imaginary threats. Meanwhile, Ash’s best friend Mark is grieving and has drifted away into his own nightmares. Ash’s only escape is his lonely mountain running, training to be the stag boy in the annual Stag Chase. But dark things are stirring. Ash begins to wonder if the sinister stories about the Stag Chase are true. Could Mark and Dad be haunted by more than just their pasts?