Edgar Brim is a sensitive orphan who, exposed to horror stories from his father as a young child, is afraid of almost everything and suffers from nightly terrors. His stern new guardian, Mr. Thorne, sends the boy to a gloomy school in Scotland where his dark demons only seem to worsen and he is bullied and ridiculed for his fears. But years later, when sixteen-year-old Edgar finds a journal belonging to his novelist father, he becomes determined to confront his nightmares and the bullies who taunt him. After the horrific death of a schoolmate, Edgar becomes involved with an eccentric society at the urging of a mysterious professor who believes that monsters from famous works of literature are real and whose mandate is to find and destroy these creatures. With the aid of a rag-tag crew of friends, the fear-addled teen sets about on his dark mission, one that begins in the cemetery on the bleak Scottish moors and ends in a spine-chilling climax on the stage of the Royal Lyceum Theatre in London.