Kyung-chul is a hazardous maniac who slaughters for joy. He has submitted fiendish sequential killings in wicked ways that one can’t envision and his exploited people extend from young ladies to even kids. The police have pursued him for quite a while, however were not able catch him. At some point, Joo-yeon, little girl of a resigned police boss turns into his prey and is discovered dead in a horrendous state.
Her life partner Soo-hyun, a top mystery operator, chooses to find the killer himself. He guarantees himself that he will do his best to get grisly revenge against the executioner, regardless of whether it implies that he should turn into a beast himself to get this massive and unfeeling executioner.