Swallowed by the impossible, shifting nightmare of the Infinity Castle, Tanjiro and the elite Hashira stand at the edge of oblivion. To reach the immortal progenitor of darkness, Muzan Kibutsuji, they must first survive a blood-soaked gauntlet against his deadliest Upper Ranks. Within a surreal labyrinth where gravity bows to malice, humanity’s final war erupts—a desperate, breathtaking clash of steel, sacrifice, and survival.