"When traces of a radioactive material are found with a body in Key West/Florida, multiple federal agencies suddenly descend on the scene. This is not just an isolated murder; a domestic terrorist group is ready to bring the US government to its knees. The threat hits close to home for ISB Agent Joe Dempsey when he discovers a personal connection to the group. With his new team member, former Secret Service agent Eden Grace, Dempsey joins the race to track down the bomb before it's too late."