Princess Luna is trying to find ways to remember the important ponies from her past, but is finding that it is difficult to maintain a perfect recall over the events of a long life. Then Discord gives her something unexpected to think about.
Discord and Princess Luna have fallen in love, that nopony else knows about. But suspision starts rolling across Equestria as a crazy night starts going on, and Celestia needs to find out what the heck is going on.