While wandering around alone, Ophelia hears something beyond a locked door in a remote room of the castle museum. When she looks in the keyhole she sees there is a boy within. The boy is personable but sad; his purpose, he says, was to save the world, but he has not been able to accomplish it locked away as he is. Ophelia decides to help him and must overcome a series of harrowing adventures within the castle museum to do so. All the while her father and sister seem to be losing themselves to the museum’s caretaker who gives Ophelia the shivers. Suddenly the race to save the boy becomes a race to save her family as well. Can Ophelia and the Marvelous Boy destroy evil in time?
If you enjoy magical fantasies with a bit of creep-factor you might also like The Graveyard Book or The Ocean at the End of the Lane, both by Neil Gaiman, or for something even more creepy try Sabriel, by Garth Nix.