Strange things have been happening inside the Florida park: parts from one ride are found mysteriously moved to another; in the Fantasmic! show, the dragon unexplainably triumphs over Mickey; little blips in story lines and "offstage" antics by characters trouble managers. Finn Whitman, a middle-schooler, goes to sleep one night and has the dream of a lifetime: he "wakes up" inside Disney World as his DHI character, a glowing hologram. He meets an old man there, Wayne, who claims to be one of the original Imagineers and explains to Finn that he "and your friends" have a mission to save the park from forces that humans can neither see nor hear. Not believing his dream, but not totally discounting it, Finn, back in real life, sets out to find the four other kids who were chosen to be DHIs and in doing so he learns an eerie fact: he is not alone in this "dream." The others have had similar experiences. What if this is for real?