During the Fairy Tail disbandment. Makarov hadn't thought about how this tiny action would effect the 'Heart' of Fairy Tail. He wasn't the only one at fault either, every else was too. They had gone their own ways, leaving the Fire Dragon Slayer alone at the piles of the remains of their once luxurious guild hall. Happy wasn't there for him either. He had gone with Wendy and Carla. Being alone, he got trained until he even rivaled Jura. But that just had given a boost to his darkness.
While in a forest, he had found the Book of E.N.D. He regained everything he had lost; his power, memories, and personality. And that action, recreated Tartaros. They continued to destroy like they once were. But now that their Master was back, everything is different.
Will the Fairies gather again to fight the demons once again? Why is there two Tartaros guild members in the front, blocking Avatar from their purification ritual? And why are they stopping them? Just who are they?