The mystery only deepens from there, as Stevens and Carla Windermere, his partner in the new joint BCA–FBI violent crime task force, find themselves on the trail of a massive international kidnapping and prostitution operation. Before the two agents are done, they will have traveled over half the country, from Montana to New York, and come face-to-face not only with the most vicious man either of them has ever encountered—but two of the most courageous women.