Tak Se-young, a comatose high school student waking up from a brutal assault, is intent on getting revenge against the corrupt classmates who ruined his life and escaped justice when he acquires a mystical giant sword. But when he trains on his rooftop, he becomes an unstoppable force, and has yet to be caught by the helpless police. Using his unmatched combat experience and superhuman strength from his training, Se-young recruits no allies, choosing to destroy corrupt syndicates, fight entire armies, and bypass the laws that failed him. But will he be able to find true peace and stop his relentless wrath?