They're a five-member girl group, Thriller. They might have chosen different paths in life but when it comes to music, they share the same ideals, led by their manager Seok. Taking after his policeman father, Seok is a man's man, helping the girls through their failures and sharing their happiness in success. He's a righteous, strong man ready to protect them whenever they fall in danger. And, sure enough, danger comes! Driven away by their conflicts and different personalities, the girls find themselves in trouble, one of them becoming a victim of rape. But fear not, Seok will try to get every single one of those responsible for such a crime. And when Seok gets angry, he becomes a Crazy Boy.

Detective Oh goes searching for the murderer of Yang, a small-time brewer bludgeoned to death by a quiet riverside with no witnesses, no apparent motive. As he wanders about the winter landscape of South Jeolla Province and Seoul, he finds himself caught in a story of treachery, rape and murder.