Katarina Mars is the new girl at BAU. She's got the tactical scores and the brains for the job. The whole team immediately accepts her. Is it possible our favorite boy genius could fall for her? And will she fall for him?

Dr. Madeleine Gerron, a nineteen-year-old genius already holding two PhDs who graduated high school at the age of twelve, has been asked to join the FBI Behavioral Analysis Unit, a team of highly qualified agents who analyze criminals' behaviors to solve cases. Influenced to join by a traumatic experience that involved her, her parents, and her younger brother, she finds that after a lifetime of not fitting in, the BAU is probably the one place where people understand her, especially the intelligent and seemingly attractive Dr. Spencer Reid.

UP TO CHAPTER 14 REVISED. The BAU heads off the Hill Lake, MN to catch a serial killer that strangles their victims. However, this case is not all that it seems. When the UNSUB takes Reid hostage, the team has two days to find him or else the Hill Lake Strangler will have another victim.

Six years ago, the BAU team watched their youngest member fall apart, and now as he grows secretive and distant again, they start to think the worse. Their suspicions get worse when they are called to Las Vegas to assist on a serial killer case and he closes himself off but when Dr. Spencer Reid disappears from his hotel room, the team have to work quickly to find him before they have another body on their hands.