Zack Walker is back and on the job as a features writer for the city paper. While researching his first assignment Zack stumbles upon a homicide that may be linked to a gang that's been terrorizing the city’s high-end shopping district. Suddenly, he finds himself at the center of a violent crime wave and destined for a confrontation with Barbie Bullock — a ruthless criminal with a disturbing obsession. As worlds begin to collide and boundaries between family and foes blur, Zack must be ever vigilant to outwit the evil at large, whether in the suburbs, the city, or in his own imagination. Heaven help the bad guys when this resourceful father comes to make good on a deal gone bad.

Newspaper writer, family man, and reluctant hero Zack Walker has stumbled onto some dicey stories before, but nothing like what he’s about to uncover when a mutilated corpse is found at his father’s lakeside fishing camp. As always, Zack fears the worst. And this time, his paranoid worldview is dead-on.

While the locals attribute the death to a bear attack, Zack suspects something far more ominous — a predator whose weapons include arson, assault, and enough wacko beliefs to fuel a dozen hate groups. Then another body is discovered and a large supply of fertilizer goes missing, evoking memories of the Oklahoma City bombing. But it’s when he learns that his neighbor is a classic Lone Wolf — FBI parlance for a solo fanatic hell-bent on using high body counts to make political statements — that Zack realizes the idyllic town of his childhood is under siege. The fuse is lit to a catastrophe of unimaginable terror. And with time running out, Zack must face off with a madman.