Yang Kaixin's nickname is "Fearless Killer". He is a just man and specializes in killing evil people. One day, a mysterious guest hired him with a large sum of money to kill Hu Shuhua, the leader of the Huashan Sect, claiming that Hu had an animal heart and had raped a young girl. Yang Kaixin learned that both human and physical evidence would appear at the Wudang Mountain Conference, so he resolutely participated and exposed his crimes at the conference. In the end, he committed suicide after being injured. This matter quickly spread throughout the world, and people were talking about it. One was that Hu Shuhua deserved to die and Yang Kaixin was a hero; the other was that there was something else going on in the case and Hu Shuhua was unjust. Yang Kaixin often prides himself on never killing anyone by mistake. Now that he knows there are doubts about the case, he is determined to find out the inside story. What is the result? "Fearless Killer" is a complicated but touching story full of family, friendship and human feelings.