It is a dark time in Equestria. Foals have been disappearing at an alarming rate and no one seems to know how or why. Princess Celestia, frantic for answers and impatient for progress, calls in a special investigator to find out who, or what, is responsible.
With Twilight Sparkle by his side, he pursues forces more powerful than any ever encountered before through wonders beyond her wildest dreams to avert disaster.