Lee Jungeun is an earnest and hardworking 17-year-old. After her parents' divorce, she moves to Seoul with her dad and begins a new life. She befriends a girl named Seo Woomi and starts to adapt to her new environment. Lee Jungeun goes with Seo Woomi to pick her drunk brother up and they end up encountering a group of gangsters who try to mess with Woomi's brother. But when one of them falls for her, what will she do?