The book Kingdom Keepers is about Finn Whitman, who, along with four other kids, become Disney Hosts Interactive, who are like tour guides in the Magic Kingdom, except holograms. But when they go to bed each night they reawaken in the Magic Kingdom, more DHIs now than human. When they meet Wayne, one of the original workers, an imagineer, he tells them of the Stonecutters Quill, a fable that Walt Disney left to help defeat the overtakers. You see, when the park closes, all the characters come to life. But not only the heroes and good guys come to life, like Goofy, but also the bad guys and villains, like the Pirates of the Caribbean pirates, and the big bad guys like Maleficent, and Ursula. Now as the overtakers start trying to go beyond the parks walls, Finn and the others must find all the clues for how to defeat the first of the overtakers to go after them. They know that the hints in the Stonecutters Quill refer to the sun, rock, clouds, and wind, so they must venture onto the rides at night, which few people now that they stay on, but dark forces are willing to stop them, and don't care about trashing the park. So now, with evil villains after them, Finn and the other DHIs must solve the fable and save Disneyland's Magic Kingdom!