Six years ago, Lu Xiangbei was the well-known national security agent "King of Hell". He suffered a blood debt due to a mission error and became a single dad incognito. The peaceful life was broken by her ex-girlfriend Su Qing, who led the Dark Moon Organization to kidnap her daughter Lu Xiaoguo. Her former brother Chen Hao also secretly betrayed her. In order to protect his daughter, Lu Xiangbei returned to the world and fought back with thunderous means. He switched between a gentle father and the decisive King of Hell, gradually uncovering the conspiracy of the Dark Moon Organization and embarking on the road of revenge and protection.
