Kirito, Asuna e seus amigos começam a testar um novo jogo usando um aparelho avançado de realidade aumentada que entrou na moda recentemente. As coisas, no entanto, começam a ficar estranhas quando encontram uma IA e o player level mais alto do jogo.
People everywhere were enjoying a new game called Ordinal Scale, an ARMMORPG developed exclusively for the Augma, a new wearable console designed for AR (augmented reality) gaming. But, the players had no idea that a nightmare from the virtual world was starting to spread into reality! As his fellow players find themselves in danger, the hero is called upon once again.