Martial Peak. The path to the martial peak is long, lonely and solitary. You must live in the face of hardship, and remain unyielding. Only then will you break through to become the best, and start on your journey. Sky Tower is testing its followers to train them for this trip in the harshest ways. One day, Yang Kai, the lowly sweeper, managed to get a black book, putting him on the way to the world of martials.