During the late Ming Dynasty, the powerful eunuch Wei Zhongxian abused his power, arbitrarily eliminating his rivals. Tang Baojia, who had eloped with his lover, was captured and forced to become a killer. Due to his outstanding performance, he gained Wei Zhongxian's favor. However, when he met his former lover by chance, his conscience awakened, and he decided to turn over a new leaf, vowing not to be a killer anymore... But in the end, he still infiltrated the tiger's den and eliminated Wei Zhongxian, who had brought disaster to the country and its people.