Eccentric, reclusive Walter Rennert lies cold at the bottom of his stairs. At first glance the scene looks straightforward: a once-respected psychology professor done in by booze and a bad heart. But his daughter, Tatiana, insists that her father has been murdered, and she persuades Clay Edison to take a closer look at the grim facts of Rennert's life. What emerges is a history of scandal and violence and an experiment gone horribly wrong that ended in the brutal murder of a coed.

By age twenty-four, Letty Davenport has seen more action and uncovered more secrets than many law enforcement professionals. Now a recent Stanford grad with a master’s in economics, she’s restless and bored in a desk job for U.S. Senator Colles. Letty’s ready to quit, but her skills have impressed Colles, and he offers her a carrot: feet-on-the-ground investigative work, in conjunction with the Department of Homeland Security.

Virgil Flowers kicked around for a while before joining the Minnesota Bureau of Criminal Apprehension. First it was the army and the military police, then the police in St. Paul, and finally Lucas Davenport brought him into the BCA, promising him, "We'll only give you the hard stuff." He's been doing the hard stuff for three years now, but never anything like this.

It was summer in the mountains when five small children vanished from their nursery school picnic. The heat was stifling that day, the tinkle of an ice-cream van in the air.... Three-and-a-half years later, in the dead of winter, the children are returned to their families...one by one. All except for Ivy - the granddaughter of Homicide Detective Kate Wakeland. The other four children say Ivy is dead.

In a secluded farm house in the Pacific Northwest, a family has been slaughtered - and a teenage son has disappeared. Single mother and cop Emily Kenyon spearheads a dark hunt for a killer. But Emily's teenage daughter, Jenna, is one step ahead of her. Then another family is butchered, and another. As Emily fits the puzzle pieces together, she makes a chilling discovery: The killer is coming after her and her daughter....