Following the devastation of the Third Division, Japan was split into two halves. Years later, the crime syndicate Vischio has taken over the ruined city of Toshima, formerly Tokyo, and hosts a brutal combat tournament called Igura. The story centers on Akira, a young man falsely accused of a crime and arrested. While in custody, a mysterious woman offers him freedom on one condition: he must take part in Igura and confront its fiercest combatant, the king known as Il‑re. As Akira navigates the lawless streets of Toshima, he must fight for survival while uncovering the secrets that surround him.