Chikage grew up in the shadows of Shumisen, a clandestine organization that hunts supernatural threats by binding them with mystical spirits called "In." His childhood fractured when his father fell to assassins within their own ranks, leaving him emotionally scarred and withdrawn. Years of isolation give way to unexpected opportunity. Chikage finally masters the dangerous art of controlling an "In," and Shumisen sees potential in him for something bigger than standard demon-hunting work. They give him a mission: infiltrate the organization's inner circle and eliminate the traitors who murdered his father. Caught between vengeance and duty, Chikage must navigate a world where trust is a weapon and every operative might be an enemy. The line between hunter and hunted blurs as he closes in on those responsible for his pain. Action pulses through tense negotiations and supernatural combat, all while Chikage wrestles with whether eliminating the guilty will actually heal the broken parts of himself.