Everyone is terrified of Han Serim thanks to rumors that she’s a gangster. Golden boy Kang Seung-Woo ends up paired with her for a mentor-mentee program. Ever the perfectionist, he tries to get close to Serim to ensure everything goes off without a hitch. But… what is her deal? A high-stakes romance between Han Serim, who lives like there’s no tomorrow, and Kang Seung-Woo, who has his entire life perfectly mapped out.