Sunset Shimmer doesn't remember what happened at the last night's party. And worse yet, she can't remember just which one of the Twilight's she slept with
Future universe. "Sister" Princesses Sunset Shimmer and Twilight Sparkle mourned the loss of Equestria's favorite Princesses - The royal natural-born alicorn sisters Celestia and Luna. In an attempt to win them back, they resurrect them - as fillies.