The sister of female doctor Liu Xiaozhu was raped many years ago, but the rapist Bai Qirong was at large. The sister could not bear the humiliation and eventually committed suicide. In order to avenge his sister, Liu Xiaozhu planned for many years and vowed to carry out a perfect murder against Bai Qirong. However, as the plan progresses, she gradually discovers that the truth many years ago is far more complicated than she imagined. Her sister's suicide was not caused by Bai Qirong alone.
