S1, E1: New three-part domestic horror drama. The story focuses on a 17-year-old boy, known only as HIM, who is caught in the limbo between childhood and adulthood. He is also trapped between the two homes of his divorced parents, each now remarried with new families. A cuckoo in both their nests, he is a reminder of the failure of their marriages and a threat to their new found domestic bliss. Like any teenager, he is riding a rollercoaster of confusing emotions. Like most boys he finds it hard to process his feelings and tends to act out. His behaviour is also triggered by something else. He is engaged in a primal struggle to contain the terrifying secret of a supernatural power he has inherited from his grandfather. Only his ageing grandmother understands and urges him to use his gift only for good - for she knows if he does not it could end in tragedy.