Yang Ming is an older brother who works at a construction site to support his younger sister in college. In the cold winter of 2006, his 18-year-old sister Yang Rui suddenly committed suicide. He saw traces of abuse all over his sister's body in the funeral home and concluded that her sister died of homicide. His personality changed drastically and he became crazy and cruel. From then on, he embarked on the road of revenge by using violence to fight violence and pursue the truth.
