Synopsis: When Disney comes looking for five teenagers to serve as actors for a new technology-Daylight Hologram Images, or DHIs-there is more to it than meets the eye. 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…