Nina Truman is a missionary nurse, serving in a tiny Guatemalan town not far from the Mexican border. It's a fulfilling life, tending to the village poor, a way to serve in the country from which she was adopted. The day she leaves on furlough, is the day her life falls apart. Her bus is ambushed and she must flee from forces who inexplicably wish her dead. Nina's only hope of survival lies in the hands of Shaw Wilder, a man who despises missionaries and the God they serve. His skill is in handling a landmine detection dog, not helping a woman he blames for the death of his sister. Trapped between a ruthless drug lord and his assassins, a corrupt police chief, and colleagues with ulterior motives, her friends may prove just as deadly as her enemies as she uncovers a plot tangled deep in the roots of her own past.