Min-seo, a 17-year-old boy who claims to be a loner. Jiwon, a friend who only looks perfect to him, approaches him like a savior. One day, Min-seo, who rescues Ji-won from a hit and run accident, wins a crush on him, and Minseo, who gained the courage to become close with Ji-won, invites a friend to her house for the first time in her life. However, as he gets closer to him, his questionable words and dangerous actions start to create a strange tension at the same time, and he begins to swallow everything in Minseo one by one... What is his true identity?