As his name suggests, Jung Ba Reum, a handsome fellow, is perceived as a righteous police officer who once had the honor of being recognized as a hero citizen. His willing and caring characteristics are loved by the people in Gudong where he works as the lowest-ranking officer of a police substation. Drawing the line between a detective and a criminal is nearly impossible when it comes to Ko Moo Chi, a pugnacious detective. His notorious nature may have allowed him the highest felony arrest rate, but he has no intention whatsoever to climb up the police ladder. Instead, the only thing he is after is revenge against a psychopath who took the lives of his parents. The story takes a turn when one day Ba Reum and his partner, Moo Chi, end up chasing a psychopathic serial killer, possibly the one whom Moo Chi was looking to kill.