The ultimate collision between the iron-blooded world and the innocent campus. It tells the story of a powerful gangster in the past who, after experiencing the betrayal of his brothers and the catastrophe of life and death, anonymously entered an ordinary high school and became a teacher. He used the wisdom of the world to protect students and redeem himself. He struggled on the edge of good and evil, and finally put down his butcher knife to complete self-salvation while protecting the pure land of a campus. It explores violence and tenderness, hatred and forgiveness, and human choices in the past and future.
