Liang Hen is the "number one killer" in Jindu. By chance, she receives the task of assassinating General Ningyuan Nan Linglie, and the story of the two begins. With their efforts, they not only found the only son of Liang Hen's master Ye Xuan who had been missing for many years, but also implicated the mystery of their life experiences. In the adversity of life and death, their feelings quickly heated up. It also involves the struggle for the throne and the intrigues in the officialdom. There are also some unexpected things about to happen...