At Sangmin High School in Seoul, five students are invisible to the world-bullied, ignored, and broken. But beneath their silence lies a terrifying truth: they are demon hunters. Bound by blood contracts with the underworld, each wields a deadly supernatural power-gifts that come at a cost. Every battle chips away at their bodies, minds, or souls. They don't fight for fame or glory. They hunt to survive, to atone, and to stop the demons that feed on human souls.