Pipsqueak said that Luna was the best princess, so, obviously, he was sent to the moon by Celestia, now he is on the moon and stuff and there's this pony who looks suspiciously like a member of the Canterlot guard. How are they going to get off the moon, more importantly, how are they going to deal with the strange monsters that were Nightmare Moon's playthings, and is Nightmare Moon's soul still living on the moon?

Spellsworth, Papyrus, Dr. Shape, and The Collector need to stop the evil Destroyer of Knowledge and save all pony knowledge of all eternity. They need to discover this evil creature and stop him from turning ponies, unicorns, and pegasi alike into illiterate, uneducated idiots, can they do it?