As the five Kingdom Keepers enter high school, everything is about to change. The Maintenance Base that controls all four parks in Disney World is under attack by the Overtakers, a group determined to change Disney forever. Relationships between the Keepers are no longer as simple as they once were. In fact, nothing is as simple as it once was. An after-hours visit to Typhoon Lagoon is a game changer. The Keepers lose one of their most valuable supporters. But there's work to do . . . The Disney Dream leaves Port Canaveral on an historic cruise to Los Angeles with a special treat in store for guests: the Disney Host Interactive guides are on board!