Lee Min Ho

Last and only generation of Lee family. He abominates women especially who are depraved and lustful. He became a serial murderer after his parents were framed-up and died dishonor by an atrocious woman who was madly in love with his father and was furious when she unable to seduce him.

Park Shin Hye

Sole daughter of Commissioner General of Police Agency. She used to have bright and cheerful personality and love to adventure since childhood. She loves and admires her father and has a dream of becoming an outstanding police officer like her father until she met a man in dark.

Yoo Yeon Seok

Cousin of Park Shin Hye. His parents died since he was very young and taked care by his mother's older brother. He loves and care about the only relative he has, his uncle and his little sister. He lives together with them and works as a National Police officer under his uncle authority.

Ryu Seung Ryung as Park Seung Ryung

Commissioner General of National Police Agency. Although he adores and cares for his only daughter, he strictly contorl her due to his overproctive instinct, after his wife was passed away during giving birth of their daughter.

Ahn Kil Kang

The truthful confidante of Lee Min Ho's father. He took care Lee Min Ho since his parents' death. He always help him and decided not to against his will until he died.