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.

A known serial killer is once again taking lives in Chicago. Bodies drained of blood are being strewn across the city. For former Tampa homicide sergeant, Hank Rawlings, tracking down the man responsible for the killings becomes his first assignment at his new position, agent in the FBI's homicide division of the serial crimes unit. Almost before the ink dries on the new job's acceptance papers, Hank finds himself in Chicago, knee-deep in an investigation with a mounting body count.

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.

1964 - London. Dolly Vincent is born to an East End gangster but is sent away for her own protection. Mad Mick is hell-bent on his revenge and will stop at nothing to kill her. Estranged from her family, she becomes a successful barrister, but after defending a young Italian man she finds herself caught up in a secret held by a high court judge. Tortured and left for dead, she flees London and heads to New York. Only the Vincents know where she is...but even they don't know the truth.

Twenty years ago Emily Mills's father was murdered, and she found his body hanging in the backyard. Her younger sister, Madison, claims she was asleep in her room. Her older sister, Tara, claims she was out with friends. The tragedy drove their mother to suicide and Tara to leave town forever. The killer was caught. The case closed. Ever since, Emily and Madison have tried to forget what happened that night - until an eerily similar murder brings it all back.