A report about missing sex workers leads to Yoo Young-chul's arrest. Under interrogation, he confesses, but detectives aren't sure what to believe.

Violent killings target wealthy victims around the city. Matching footprints found at each scene suggest a serial murderer on the loose.

As Yoo's victims are found buried and mutilated, a media storm descends upon the case. In need of tangible evidence, police head to his apartment.