Acan is a middle-aged lawyer who has become a new lawyer. Due to heavy debts, he wants to give up several times, but God seems to remind him through various things - don't give up. As a result, Acan regained his strength and worked hard to make progress, and the debt was slowly eased. At work, Acan met lawyer Gao Feng and lawyer Jin Teng. The three became good friends, and their lawyer career made a qualitative leap. Later, while handling the case, A Can and A Feng offended Long Yu, the boss of the Prince Group. The boss of the Prince Group was gentle on the surface, but in fact he was cruel and vicious. He recruited top killers like Zuo Long Youhu as his subordinates. In order to warn A Can, A Feng and the others, Long Yu sent someone to kill Coach Huang in a case. This aroused A Can's righteous and compassionate spirit, and decided to avenge the innocent dead. But Acan knows that his opponents are powerful and it is difficult to defeat these criminal groups with his own skills. Zuo Long and You Hu gave A Chan a week to improve his combat effectiveness before another decisive battle. Acan used this week to separate from his family and friends, and went to go alone to Gu Qinglang, the instructing lawyer during his internship, to learn the secrets of Xinglong Boxing. During his internship, Gu Qinglang asked Acan not only to learn law, but also to learn boxing for self-defense, so that he could gain a firm foothold in the complex world and then help the disadvantaged groups. After some pleading, Gu Qinglang felt pity and trained Acan for seven days to stimulate Acan's core strength body. He learned the secret of Xinglong Fist. So, he started a new stage, vowing to eliminate the three major criminal groups in the world that even the police dared not touch, and to help the disadvantaged through law and boxing.