Starlight Glimmer and her friends, both new and old, work together to save Equestria, spread light and hope, and as always: Make friends and share the Magic of Friendship

After the defeat of Cozy Glow, Chrysalis and Tirek, Starlight has to take over Twilight's old castle and her school. She was sure could handle it all, but things quickly grow difficult, with both Festival planning and uncontrollable evil to stop.