Laura flees abuse and becomes hired as little Oscar's teacher at the Blacksberry estate, hidden among the Welsh mountains. On the way, she knocks down a boy and, fearing punishment, throws his body off a cliff. And then she sees a photo of Oscar in the house and realizes what she has done... But what really happened to Oscar? In Blacksberry, Laura experiences pangs of conscience, reveals the secrets of the house and its inhabitants, learns the horrors that happened here 100 years ago, finds herself in the world of black magic, curses and rituals, ghosts and her worst fears...