Ma Yi-Deum has worked as a prosecutor for 7 years. She sometimes resorts to drastic methods to win cases. One day, Ma Yi-Deum is transferred to a special division dealing only with sex crimes.

Cha Dohyeon is a rich heir to a family company with one major problem. Due to suppressed childhood trauma, he suffers from dissociative identity disorder manifested in seven unique personalities who are out of his control. In order to overcome this disorder in secret, he hires a first-year medical resident to help him heal by killing off each personality one by one.

Hong Shi Ah wants to become a successful webtoon artist but is stumped for good material for her comics. When she stumbles upon the Boys Archery Club, she is mesmerized by all the good-looking boys who belong to the club. She decides to join the club as the team manager to find inspiration for her work, only to become entangled with two of its members, Joo Seung Joon and Yoo Ji Wan.