Quinn Parker has been best friends with Spencer Reid since she was 7. They felt like they were the only people that were able to understand each other. At the age of eleven, she witnessed her own parents' murder and was taken in by Spencer and her mother. Now, at the age of 23, she followed in his footsteps and joined the FBI, being assigned to the Behavioural Analysis Unit. But what happens when a chain of murders with a familiar signature arises? How will Quinn handle the memories that she has tried so hard to supress? And will she finally feel like she can rest?