Rainbow Dash isn't Scootaloo's only hero. Can three intrepid fillies cut their teeth as Superheroes and earn their cutie marks? Is Pinkie Pie really the notorious Okie Dokie Loki Pie-Smith? There's only one way to find out... CUTIE MARK CRUSADER CRIME-FIGHTERS, YAAAAAY!

One thousand years ago the Mare in the Moon was released from her prison with the aid of the stars, precipitating a series of events that fulfilled an ancient prophecy and changed Equestria forever. Now one young filly sets out to learn the truth of what happened only to discover a secret history and a wonderful destiny of her own.