"Richard" (Matt Smith), his wife "Jules" (Morfydd Clark) and their young son "Owen" (Arthur Shaw) have moved back to his late father's remote hill farm. Not long after they arrive the young, asthmatic, lad starts to hear a voice that seems to be compelling him to become erratic, even violent. Before his parents get to the bottom of this, though, there's a tragedy that upends their marriage and sees him spend an increasing amount of time doing what he like to do best - archeology. He is out in all weathers and one day discovers the skeleton of an animal. Meticulously boxing it up, he takes into ...