For eleven years, the sky has been the color of a bruise that never heals. Dimensional Cracks tear open without warning, vomiting monsters into the streets, and humanity's only defense is the Wardens — ranked warriors from F to SS. Kael Veyron is none of them. He is twenty, starving, homeless, and utterly alone. A failed Null with nothing but a strange silver scar on his cheek. The world has stepped over him so many times he has forgotten how to stand up. Then a silent crack opens. A hand pulls him into the void. Two ancient beings seal a living power — the Vessel — into his chest, and a shadowy guide named Nox demands he get strong. Kael refuses. He has no one left to protect. Until he finds a team. A bed. A meal. People who know his name. For the first time, he believes he can leave the monster inside him buried forever. Then the "easy" raid goes wrong. His team is slaughtered. Kael survives not because he is strong — but because he froze. And deep inside him, behind walls built by gods, the sealed Vessel stirs awake. Not to conquer. Not to destroy. To protect. Now Kael must choose: stay the weak boy the world abandoned, or rise and become the shield it needs. He was chosen not to destroy the world. He was chosen to save it.