In the first of a thrilling new series, FBI Special Agent Meg Jennings and Hawk, her loyal search-and-rescue Labrador, must race against time as they zero in on one of the deadliest killers in the country... Meg and Hawk are part of the FBI's elite K-9 unit. Hawk can sniff out bodies anywhere-living or dead. When a bomb rips apart a government building in Washington D.C., it takes all of the team's extensive search-and-rescue training to locate and save the workers and visitors buried beneath the rubble. But even as the duo are hailed as heroes, a bomber remains at large, striking terror in a widening spiral of unpredictability. As more bombs are detonated and the body count escalates, Meg and Hawk are assigned to a task force dedicated to stopping the unseen killer. It will come down to a battle of wits and survival skills between Meg, Hawk, and the bomber they're tracking to rescue a nation from the brink of chaos.