The dogs are trained to kill. The handlers are ghosts. And Nikki Drake just became their next target. Private investigator Nikki Drake doesn't usually accept cases from fourteen-year-olds whose life savings come from babysitting. But the girl's desperate plea to find her neighbor's stolen service dog, the only thing keeping a traumatized veteran anchored to the world, is impossible to refuse. The simple case turns deadly when Nikki's K9 partner Gunner uncovers evidence linking the theft to a sophisticated murder-for-hire operation. Wealthy clients pay top dollar to have "problems" eliminated by attack dogs, and the body count is rising. Nikki infiltrates the brutal training facility where stolen dogs are tortured into killers. But when her cover is blown, she's trapped with the teen who hired her, surrounded by animals trained to tear them apart. There’s only one way out. Fight back with a dog trained to kill.