While thirteen-year-old Johnny Dixon lies dying, possessed by an evil spirit, his friends, an elderly professor and a schoolmate, try to find some way to free him.
Johnny Dixon, Fergie, and Professor Childremass comply with a strange will left by the professor's brother, which requires them to spend the summer at a desolate estate where they encounter a madman who is bent on destroying the world.
While thirteen- year-old Johnny Dixon lies dying, possessed by an evil spirit, his friends, an elderly professor and a schoolmate, try to find some way to free him.
