Yu Guowei, a security guard working in an old factory, is at the same time, an awarded local policeman. A series of killings burst out where multiple young women are slaughtered without mercy. The police has identified the murders as the work of a serial killer, yet the case never gets solved.
Haunted by the horrifying deaths, Yu turns obsessed with the truth. During the investigation, his assistance dies from an accident. This is the last straw that breaks Yu’s back. Now, getting the one who’s responsible for all these tragedies becomes the sole purpose of Yu’s life. It is his last hope; his way to right a wrong.
A woman named Yanzi appears in town, who bears a striking resemblance of the past victims. Yu has attained a close relationship with her in the hope of coming across the killer; yet in the end, what he gets is one beloved filled with despair after learning the truth.