When five present-day teenagers known as the Kingdom Keepers travel back to 1955 for Disneyland's Opening Day, the early days of the Tower of Terror, the origin of the Overtakers, and the real power of magic unfold in an unexpected series of events that propels the Keepers into a darkness no one saw coming. Traveling back in time to 1955, the Kingdom Keepers investigate a long-buried secret that threatens Disneyland's opening day and everything Walt Disney worked to create.