"Catch them young enough and the possibility for change is endless..." Or so the old adage says.

When filly Twilight finds herself friendless at the beginning of her time as Celestia's student, she turns to talking to the Moon at night. But one night, the Moon answers back, and thus starts a chain of events that will mold Twilight into a slightly different pony... and change the future of Equestria.

(Yes, it contains sex)