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.

The "maddog" murderer who is terrorizing the Twin Cities is two things: insane and extremely intelligent. He kills for the pleasure of it and thoroughly enjoys placing elaborate obstacles to keep police befuddled. Each clever move he makes is another point of pride. But when the brilliant Lieutenant Lucas Davenport, a dedicated cop and a serial killer's worst nightmare, is brought in to take up the investigation, the maddog suddenly has an adversary worthy of his genius.

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.

Mickey Gibson, single mother and former detective, leads a hectic life similar to that of many moms: juggling the demands of her two small children with the tasks of her job working remotely for ProEye, a global investigation company that hunts down wealthy tax and credit cheats. When Mickey gets a call from a colleague named Arlene Robinson, she thinks nothing of Arlene’s unusual request for her to go inventory the vacant home of an arms dealer who cheated ProEye’s clients and fled.

In Washington, D.C., a cell phone rings. The White House chief of staff needs Jacob Winter now. His chief investigator and an Army Intelligence veteran, Winter knows how to move quickly and decisively, but he's never faced a problem like this. The disappearances are bad, but when the blackened body shows up barbed-wired to a tree, Winter knows there is much worse to come. And soon enough, there is. Large forces are at work, determined to do whatever it takes to achieve their ends.