A string of young women are murdered in Yanhai City.
Before long, an eerie rumor spreads rapidly across the city: the serial killer known as the Pied Piper, who died four years ago, has come back to life.
While investigating, detective captain Xu Yonghan happens to notice a little girl who seems to be connected to multiple crime scenes by coincidence.
What he doesn't expect is that this seemingly ordinary girl, who has endured years of bullying at school, is entangled in every one of the cases...
[Note: Told in the third person, from multiple perspectives]
