The file shouldn't exist. When the BAU discovers a hidden collection documenting dozens of women, they expect to find victims, missing persons, and cold cases. They don't expect to find Y/N. Photographs. Surveillance logs. Detailed notes about her life. Months' worth of observations from someone she's never met. As the team searches for answers, they uncover a chilling truth: the dead suspect they found wasn't the real predator. He was only part of something much larger. Someone has been watching Y/N for a very long time. And if the files are to be believed, she's next.