Murders of young girls occur frequently in Yanhai City.
Suddenly, strange rumors spread rapidly throughout the city that the "Pied Piper", a serial murderer who died four years ago, was resurrected.
During the investigation, criminal investigation captain Xu Yonghan accidentally noticed a little girl who seemed to be a coincidence but frequently appeared at the scenes of many crimes.
What he didn't expect was that this seemingly simple girl, who had been bullied at school for a long time, was inextricably linked to all the cases...
[Note: Third person, told from multiple perspectives]
