In a world where strength defines survival, one weak and overweight student lives at the bottom of the food chain—mocked, humiliated, and beaten daily. After joining his school’s underground fighting club, his life takes a violent turn. Through relentless training, he transforms his body from fat to muscular and masters every martial art taught within the academy’s brutal walls. But his growth comes with a price: a thirst for vengeance that slowly consumes him. Once the victim, he rises as a dangerous fighter who no longer seeks justice—only revenge.