Christian Windsor is a certified genius. He's also autistic. At 23 years old, with two PhDs, Christian joins the FBI's most dangerous division, The Exceptional Crimes Unit. His first assignment? A serial killer on a rampage. Nicknamed The Surgeon, he's cutting the eyeballs out of women. That's not the only psychopath lurking in the shadows, though. There's another, and Christian can't see him.

The first victim is attacked in her home. Tied to her bed. Forced to watch every unspeakable act of cruelty - but unable to scream. The second murder is even more twisted. Signed, sealed, and delivered with a message for the police, stuffed in the victim's throat. A fractured nursery rhyme that ends with a warning: "There will be more". For detective Jack Murphy, it's more than a threat. It's a personal invitation to play.

Rookie cop Carrie Santero has always been fascinated by serial killers. As a teenager, she wrote a letter to Charles Manson in prison - and received a chilling reply. Then she came face to face with a child murderer in her small Pennsylvania town, an encounter that haunts her to this day. Now, as a detective in training, she finally has her chance to make a difference; to hunt down a psychopathic sadist who embodies the very nature of evil itself.

Wendi Wise is a troubled young woman who snorts her breakfast through a straw and spends more time in rehab than in the real world. Her life is seemingly out of control. But now she has a plan. That plan involves a sharp set of butcher knives. She's going back to where all of her troubles began...Flocksdale. Wendi was lured away from a local skating rink, at the age of 13, and held captive in a place she calls The House of Horrors. Dumped off blindfolded on the side of a dirt road, Wendi soon discovered that she was addicted to the drugs they fed her while she was captive.

When Dr. Sloan Hastings submits her DNA to an online genealogy site for a research assignment, her goal is to better understand the treasure-trove of genetic information contained on ancestry websites. Brilliant and driven, Sloan is embarking on a fellowship in forensic pathology, training under the renowned Dr. Livia Cutty. Sloan has one reservation about involving herself in the experiment: she’s adopted. Grateful for a loving home, she’s never considered tracking down her biological parents.