Not very long ago, Regina, Emma, Henry, Snow, Charming, Blue and Gold were brouught to Equestria after an attempt to take them home; now, with the Mane 6 and the Crusaders, they're searching for an old, missing spell tome, while the threat of Regina and the Amulet nags at the back of Emma's mind.

Sequel to Once Upon a Time; Failed Spell (read it if you haven't in order to understand the story)