While spending the summer in an old house on a desolate Canadian island, Anthony Monday and Miss Eells discover a chest that can transport them to another world and a maniacal group who are plotting the destruction of people on Earth.
In 1951, while visiting a distant cousin in the English countryside, thirteen-year-old Lewis Barnavelt accidentally unleashes demonic forces and summons the ghost of an evil wizard bent on killing the Barnavelt family.
When thirteen-year-old Johnny Dixon and his friend Professor Childermass try to uncover what is draining the life from the elderly Dr. Coote, they find themselves facing the forces of a manacing voodoo cult.