An explosion occurred at an indoor amusement park; the girls from Canterlot High School were caught in it. Their souls possessed the recently built animatronics of the building. The pony animatronics were under the care of Cadence. However, the ponied-up human animatronics were being controlled by the wrathful withered Celestia. It was up to the pony animatronics to save the rest of their friends and let them remember who they were before it's too late. But they were all unaware of an unknown evil that lurks within the building.