Two years after 10,000 players were trapped in the VR world and forced to participate in the impossible death game known as Sword Art Online, VR technology has only continued to evolve. A state-of-the-art AR device called the Augma has risen to prominence, becoming a near-essential part of everyday life as well as the exclusive home of an MMORPG called Ordinal Scale.

Blurring the lines between fantasy and reality, Ordinal Scale quickly captures the attention of Kirito and his friends, who decide to start playing. But things take a turn when Kirito gets word of SAO bosses appearing inside this new world...