Parker is a young FBI agent working for the Behavioral Analysis Unit, which focuses on serial murders. When she and her partner get a case that has similarities to a serial killer from Parker's childhood, memories that she had hidden begin to resurface. The killer appears to have a vendetta against her, and Parker doesn't understand why. Camryn is the murderer who is out to drive Parker completely insane. She knows exactly what to do to get under Parker's skin. With each victim, she leaves little clues to make Parker question everything about herself. Who will win in the end, the agent or the killer?