For years, detective Jae-hwan has been obsessed with catching Jin-hyuk, the serial killer responsible for the death of his partner and brother-in-law, even if the path to revenge means skipping a few rules. This intense drama follows Jae-hwan's relentless pursuit of Jin-hyuk, a serial killer who has left a trail of death and destruction in his wake. Despite the moral dilemmas he faces, Jae-hwan is determined to see justice done, even if it means breaking the law. As the story unfolds, we witness a game of cat and mouse that takes a dark turn, with both characters pushing the boundaries of morality and legality. The climax of the drama is a thrilling confrontation that will leave you on the edge of your seat, wondering who will emerge victorious.