While investigating the kidnapping and murder of a little girl, a detective spots a piece of graffiti that depicts the crime scene perfectly—but the graffiti was drawn a month before the crime took place, and that the artist knows more than he is telling.

Jang Kyung-chul (Choi Min-sik) is a dangerous psychopath serial killer. He has committed infernal serial murders in diabolic ways that one cannot even imagine and his victims range from young women to even children. The police have chased him for a long time, but were unable to catch him. One day, Joo-yeon, daughter of a retired police chief becomes his prey and is found dead in a horrific state. Her fiancé Soo-hyun (Lee Byung-hun), a top secret agent, decides to track down the murderer himself. He promises himself that he will do everything in his power to take bloody vengeance against the killer, even if it means that he must become a monster himself to get this monstrous and inhumane killer. Written by jck movies

As Korea's biggest crime organization 'Goldmoon' expands its powers, Kang, the head of police investigation planning department, orders the undercover cop Ja-Seoung to participate in project "New World", that will take down 'Goldmoon'. Ja-seong must choose either to follow Kang's orders as a cop or to keep his loyalty with Jeong Cheong, the under-boss of the 'Goldmoon' crime organization. Written by Bin