Shen Lian, an undefeated legend in the underground black boxing world, had to retire to save his seriously ill sister. Three years later, in order to raise huge surgical fees, he was forced to return to the underground world, only to find that the arena of the year had changed beyond recognition. Martial arts families, mysterious organizations, and people transformed by modern technology have appeared one after another, and a dark martial arts network all over the world is slowly unfolding. Shen Lian clenched his fists - this time, he wanted to break through not only the arena, but also the shackles of this distorted era.
