Believing that Zeref will appear at the location where several deaths will happen, the organization of the black magic, Avatar, will sacrifice an entire city. In order to stop the plan, Natsu and company run to the city of Malba.
Brandish, of Alvarez's Army, meets Natsu and company on the Caracole Island. Her power is so strong, that extinguishes the completely island. Meanwhile in Alvarez, the Emperor Spriggan returns to the Empire.
Mavis finally reveals the secrets of her past, including her connection with Fairy Tail, Zeref, and her own sin. The ever-turning gears of fate offer glimpses of hope, but also produce one final, tragic contradiction.
The "miracle" that Mavis and Zeref create, has evolved into a powerful form of magic that must keep in secret. Mavis is still regretful for her sin, but the wizards of the guild try to cheer her up. The Alvarez Empire prepares to approach to Ishgar!
Before the battle for Fairy Tail's existence begins, the guild members spend the final night in their own ways. But when Alvarez's vast army launches a surprise attack, Fairy Tail's bond of solidarity is put to the test.