When 12 year-old Bree is aboard the Haunted Mansion ride at Disneyland when it breaks down, she discovers that the Hatbox Ghost animatronic there is alive, and so are others around the park. When Bree tells him about the real world, he gets curious and wants to explore outside the park. However, an animatronic goat, Billy, thinks that all animatronics should never ever leave Disneyland. As the Hatbox Ghost stay determined to leave the park, Billy is hiding a secret about his true self. Follow Bree, Billy, and the Hatbox Ghost on an adventure through Disneyland.