H.I.T.

14 years ago, Cha Su-gyeong, then a sweet and cheerful girl, witnessed the death of her beloved, a police officer who was chasing a serial killer. Since then, she has vowed to catch the "scoundrels who can turn the world from paradise to hell," and she has become a notorious vixen, which has greatly helped her advance in the police force and become the leader of the Special Crimes Unit.