It's nearly a thousand years after the events of My Little Pony: Friendship Is Magic. Princess Twilight Sparkle, or rather QUEEN Twilight Sparkle, is all grown up, has gone into Full Royalty, and is one of Equestria's leaders. But being immortal comes with a cost, as she figures out. Her mortal friends have all died, and now she is only left with the company of Flurry Heart, Hope Moore, Starlight Glimmer, and her husband, Flash Sentry. But with Evil Sombra rising once again, she is left to face the darkness by herself. Can she do it...or will she give in to the raging Midnight Sparkle of her dreaded past?
In the epic conclusion to the Devil's Deal series, Freya has one final chance to discover the full potential of her own power, and to use it to restore balance in the universe - once and for all. After the destruction caused by Roisin, Ferya and Torix come to terms with their losses and mistakes... And prepare for a final battle that will change everything.