Celestia fails to save Equestria after Nightmare Moon's encounter. Ever since then, Celestia was nowhere to be seen. A thousand years has passed. A pony named Twilight Sparkle, a captain of the royal knights finds a book about the elements of harmony and the 2 princesses who ruled this land together. She chooses to find where Princess Celestia has disappeared to and save the corrupted princess.
((Twilight is not an alicorn here, she does not have wings.)