Two friends meet up and recall their experiences as victims of school bullying when they receive a message from a friend from 20 years ago and mysterious serial killings begin to occur.

Two friends in the past were victims of serious school bulling. One could not resist his trauma, and becomes a serial killer, walking in the path of revenge. Another one tries his best to overcome the trauma and becomes a police detective. He now faces tragic fate to risk his life to capture the serial killer.