Detective Seo-hyun, from the Violent Crimes Division, is chasing a serial killer who targets web novel authors. Just as she’s about to apprehend him, they both fall—and she wakes up in the world of a novel.

Worse, she’s now the villainess doomed to obsess over the male lead, Kylian, torment the heroine and meet a tragic end. Determined to change her fate, she decides to avoid Kylian and live quietly.

But things don’t go as planned. Kylian starts acting differently, the mischievous crown prince Diego grows obsessed with her, and even her supposed friend Aaron begins to pursue her.

Meanwhile, a string of murders eerily similar to those from her world begins occurring, leading Seo-hyun to a chilling realization—the killer may have possessed someone in this world, too…