The boy Conor O'Malley has frequent nightmares and is facing several problems. His beloved mother Lizzie has a terminal illness and he might have to live with his strict grandmother Mrs. Clayton. His estranged father lives in the United States of America. He is bullied at school by Harry. One night, Conor is visited by a tree-like Monster at 12:07 AM which tells that he will tell three true stories to Conor; in return, the boy will tell his own story to the Monster about the truth behind his dreadful nightmare.