Seohyun is a Korean detective who was closing in on a serial killer when they both plunged off a building together. But then, she wakes up inside a novel as Himena Sylvester, a villainess doomed to a tragic end. Determined to change her fate, she sets out to repair Himena’s reputation, earning unexpected admiration along the way. But just as her new life begins to turn around, she uncovers something she missed—the serial killer fell into the novel with her, so a crime spree is about to begin!