Irene shares the story of her past, including the secret of Erza's birth. She also reveals the origin of Dragon Slayer magic, her connection with Zeref, and the sad fate that Dragon Slayers bear. Meanwhile, Natsu continues his journey inside his mind.

Irene unleashes Deus Sema, a power beyond human comprehension. With only her right arm, Erza combats the spell that threatens the entire area. Meanwhile, Natsu is forced to make an important decision that will forever change his fate.