Exiled to Seoul and abandoned by the only parent she had left, nineteen-year-old Seorin is thrown into the shadows of her brother's dangerous world. Surrounded by silence, secrets, and people who don't care if she lives or dies, she meets Seungmin-cold, unreadable, and unknowingly in love with her. In a world of gangs, hidden scars, and slow-burning heartbreak, she learns that falling in love might be the most dangerous thing of all.