The story of a grim reaper who gets erased from the memories of the world for breaking the rules of heaven and falling in love with a mortal woman after inhabiting a human body.

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.