The world's first VRMMORPG game "SwordArtOnline" has become a "death game". It has been more than a month since 10,000 users were trapped in the game. After conquering the first floor of the floating steel castle "Aincrad", Asuna continued to partner with Kirito and continued the journey with the top floor as the goal. However, a conflict broke out between the two elite guilds "ALS" (Aincrad Liberation Squad) and "DKB" (Dragon Knights) that led players to conquer the game, and there was a mysterious figure behind this. In the dangerous battle where their lives are hanging by a thread, another "threat" after the pressure of "conquering" dragged Kirito and Asuna into it. The film is adapted from the popular novel of the same name by Reki Kawahara.