The final load test… The war between the Human Empire and the Dark Territory has engulfed Underworld entirely. The battle has shifted course with the Dark Territory army led by Gabriel, who seeks to capture Alice, the Priestess of Light, against Asuna and the Human Empire forces fighting to save Underworld.
As Kirito’s consciousness remains buried in a deep sleep, Gabriel, standing in as the Dark God Vecta, has recruited thousands of American players to log in to Underworld to annihilate the Human Empire forces.
Meanwhile, Asuna, Sinon, and Leafa have joined the battle utilizing three super-accounts of the deities of the Underworld.
As the Goddess of Creation Stacia, Asuna fights alongside the Human Empire forces to take on the American players in a vicious combat.
Sinon, who has gained the super-account for the Sun Goddess Solus, is in pursuit of Gabriel, who has abducted Alice, while Leafa arrives to Underworld with the super-account Earth Goddess Terraria.
But that is not all…
The impassioned speech by Lisbeth has convinced many ALO players to join the fight with the Human Empire despite the risks.
With this great war, not only Underworld’s continued existence, but the bottom-up artificial intelligence, the ultimate AI, and even the future of mankind is at stake.
Though he has yet to awaken, only one man holds the fate of this world: the Black Swordsman.
"And so the grand finale of the Alicization arc begins…"
"I'm determined to become a hero of justice for Sakura."
To save the girl...to enact the justice he's chosen...
The young man will no longer turn a blind eye to the truth.
Mages (Masters) and Heroic Spirits (Servants) work together in the battles of the Holy Grail War...a fight for an omnipotent wish-granting container called the Holy Grail.
However, this war has become horribly twisted.
A young woman named Sakura Matou, with the sins she has committed, drowns in the murky darkness.
A young man named Shirou Emiya, who vowed to protect Sakura, works together with Rin Tohsaka and throws himself into the raging battle to put a stop to the Holy Grail War.
Illyasviel von Einzbern, as one of the few who knows the truth behind the conflict, confronts her own fate, while Zouken Matou uses Sakura to try to fulfill his own desires.
"That's why...you'll need to grit your teeth, Sakura."
Will the young man’s wish reach her even as he challenges fate itself, battling against the rising tide?
The Holy Grail War is coming to an end...
The final battle is about to begin.