The story centers on the fictional city of Iltan, where a series of brutal murders occurred 20 years ago. The prime suspect at the time was Ha Il-sik, a man who committed suicide to prove his innocence under intense police pressure.
: A detective obsessed with finding the truth behind the nickname that destroyed his family. gap dong ep 1 eng sub
The tension reignites when a copycat murder occurs. A woman is killed using the exact signature of Gap-dong from 18 years ago. Cheol-gon rushes to the scene, convinced the original killer has returned. The episode concludes with a chilling cliffhanger suggesting that the legend of Gap-dong has not died, and a new game of cat-and-mouse is about to begin. The story centers on the fictional city of
The episode opens in the city of Iltan, where a terrifying serial killer named "Gap-dong" is terrorizing the community. He targets women and leaves a distinctive mark at his crime scenes. A brash detective, Yang Cheol-gon , leads the investigation. Under immense pressure to solve the case, Cheol-gon coerces a mentally challenged young man into confessing to the crimes, hoping to close the case quickly. However, during the process, the young man dies in custody. The detective is disgraced, but the murders suddenly stop, leading the town to believe the killer has vanished—or that the wrong man was accused. The tension reignites when a copycat murder occurs