Rainbow Dash was dead.None of the elements took it well, But worst of all was Twilight, living secluded in her room, never uttering a word to anyone, as she studied a forbidden art that could change everything forever; for better or worse. That was the case. But after a forbidden magic ritual gone wrong, Rainbow Dash ends up as a bodyless soul chained to a locket, unable to be seen by most ponies and unable to speak or touch them as well, now Twilight must travel across Equestria and its neighbors to find a mythical gem, which may be the only way to get her mare-friend back.
Events that lead to the story start just before the Season 3 finale. It begins about one and a half years after Twilight would have become a princess. Celestia did not test her as she had begun to date Rainbow Dash, and didn't want to add stress. AU tag because of yet unrevealed events.