The explosive action kicks off as FBI agent Ruth Warnecki hunts for Confederate gold in a West Virginia cave. She never expects to encounter the grisly murder that catapults her into a horrific plague of death, all centered on the prestigious Stanislaus School of Music.

Eve Dallas is a New York police lieutenant hunting for a ruthless killer. In over ten years on the force, she’s seen it all - and knows her survival depends on her instincts. And she’s going against every warning telling her not to get involved with Roarke, an Irish billionaire - and a suspect in Eve’s murder investigation.

Lacey Sherlock's life is forever changed when her older sister's body is discovered in an abandoned warehouse. She is the fourth victim of the String Killer, the name given by the media to a murderer who leads his victims into a maze with a ball of twine. Seven years after Belinda's death, Lacey, now an FBI agent, is paired up with computer whiz Dillon Savich, who has developed a predictive program to aid in the apprehension of serial killers.

When FBI agent Dane Carver's twin brother, Father Michael Joseph, is brutally murdered in his San Francisco church, husband-and-wife agents Lacey Sherlock and Dillon Savich take a personal interest in the investigation. Nicola "Nick" Jones, a homeless woman and the only witness to the shooting, is scared out of her mind because she is trying to hide from her own monsters.

Hoping to escape unwanted celebrity in the aftermath of a notorious incident, Ramsey Hunt settles in the Rockies, determined to bury himself in the safety of a solitary existence. But his isolation is shattered when he stumbles upon a small girl unconscious in the high-altitude forest. When strangers pursue Ramsey to his private meadow in an attempt to kill him and the girl, he's mystified that anyone would wish her harm.