Kang Jihyoung suffers relentless bullying at a special school due to his S-rank regenerative ability which forces him to endure extreme pain and doesn't leave any evidence. He relives the traumatic memory of his mother being attacked and left in a vegetative state by a group of bullies with uncontrollable abilities. He undergoes an extreme transformation while trapped in a grave, triggering excessive regeneration, resulting in a stronger exoskeleton and a deep-seated desire to escape and seek revenge. He reflects on his past and vows to change, while the bullies, now famous hunters, seem to face no consequences for their actions.