It’s been almost a year since Kay Hamilton was fired from the DEA, and since then she’s been employed by the Callahan Group, a covert intelligence agency based in Washington D.C. Her job description is as dubious as the people she works for, and the undercover mission that nearly killed her in Viking Bay has Hamilton questioning the legitimacy of her employers.

When Hamilton arrives at the Callahan Group’s K Street offices to give her resignation, she unknowingly interrupts a deadly heist where the robbers have stolen the company safe and left her employer gravely injured. She knows that Callahan didn’t keep much cash in the safe—the men must have been after something other than money. Before Callahan slips into a coma, he whispers three letters that will lead Kay to an organization even more secretive than the Callahan Group—the NSA.