The former 10-time world boxing champion begins brutal training wearing an iron ring after competing in the DOC Boxing League national tournament. The behind-the-scenes boss of the Scorpion group plans to take revenge on him and the female lead after his company's listing fails. The female lead's brother learns of the plan and comes to the club to take her away. Meanwhile, bounty hunter Ding Xiu arrives with his men, revealing that there are hidden circumstances behind his father's death. He then launches a new investigation, finally uncovers the behind-the-scenes boss, and successfully takes revenge.
