It has been three years since the Six-Winged Serpent took over an Afton's body, used it to kill five ponies, and kidnap Michael and Seth Afton. Michael was found in the underground facility while Seth's location is still unknown. The Mane Eight and William decide to go over to Freddy's to find Seth Afton and undo the sins that a demon committed. They didn't plan to go up against something so sinister.