In 1986, two female bodies were discovered in the Gyunggi Province. Both had been brutally raped and murdered in similar circumstances. Korean police now faced the first serial killer case in their country. Detective Park Doo-Man is leading the case and with the help of his aggressive partner, they will try to figure out who the potential killers are, but without much success.
However, things change when Seo Tae-Yoon, a member of the Seoul metropolitan police department, volunteers to help the investigation. With his meticulous approach to the case, it won’t take long for Seo Tae-Yoon to come up with strong evidences and clues about the identity of the murderer. But they need to act fast as they think that other murders might occur very soon."
