After the events at Camp Everfree, Sunset Shimmer hoped the rest of the summer would be spent hanging out with her friends and exploring her new magic. One night, an armored woman named HIldr arrives, wielding unique powers, and shows Sunset Shimmer that the world is bigger and stranger than she ever believed. Fighting an enemy she doesn't understand and running from a government that doesn't trust her, Sunset Shimmer does her best to help Hildr return to her own time and show that the past does not dictate the future.