Spike and Sapphire have successfully rescued the ponies of Buckington from the Shadow Dragon empire, and things seem peaceful. However, a vengeful Zog launches a counterattack on the village, and an even more fearsome foe makes his presence known. Equestria will face a challenge like never before, a couple of new friends will lend their strength against the Shadow Dragons, and Spike and Sapphire's love for each other will be put to the ultimate test in this final entry of the Sapphire Trilogy.