This is the story of Ryu, a deaf man, and his sister, who requires a kidney transplant. Ryu’s boss, Park, has just laid him off, and in order to afford the transplant, Ryu and his girlfriend develop a plan to kidnap Park’s daughter. Things go horribly wrong, and the situation spirals rapidly into a cycle of violence and revenge.

A contract killing organization is managed like a normal company. Hyung-do who regards killing as nothing more than repetitious routine is working for this company. A man loyal to his company and accepted as the firm’s best killer, Hyung-do one day starts feeling doubts about his job and decides to quit his job for a woman he is in love with. Instantly, he is under the threat of being hunted down by his former colleagues.