Young Conor struggles to deal with his mother's terminal illness, the cold grandmother he has to stay with and the bullying he receives at school. He is woken from a recurring nightmare by the visitation of a tree monster at his bedroom window, telling him a series of stories. In return, Conor must tell the monster the truth behind his dreadful nightmare. Fantasy drama based on the award-winning book by Patrick Ness, starring Lewis MacDougall, Felicity Jones, Sigourney Weaver and Toby Kebbell, with the voice of Liam Neeson