Soo-Yeol works as a police officer for the Mooui Police Department. He is competent at his job, but he also has questionable ethics. He will do anything to achieve success. Due to his ambitious personality, he has received promotions in a short period of time. His smooth life suddenly changes with the appearance of K. K is a righteous person, but also a crazy person. Whenever he faces injustice, he meets it with a fist. He dreams of being a hero.