King Sombra has won the battle for the crystal heart. Cadence and Shining Armor are forced to retreat back into Equestria. The Royal sisters try to help, but it is too late. The walls keep everything in, and the rest out. The mane six are forced to labor for their new lord, but Fluttershy is kept as his personal servant. When a new even darker evil approaches, can Fluttershy reform Sombra and show him the errors of his ways before it is too late?