The Grey Gang was the most vicious criminal kidnapping ring in the nation. Ordinary police could not capture them. Their victims mounted. So J. Edgar Hoover assigned his top G-Man to track them down. Special Agent Dan Fowler was the right man for the job. Tough as nails, cool under fire, he was as relentless as his enemies were cruel. Fowler swore an oath to crush these murderous specialists in the snatch racket. It was his job. But it was also personal. Backed up by agent Larry Kendal and the resourceful Sally Vane, Fowler and his crack F. B. I. team waded through more Hell than any G-Man before him. And Dan Fowler always got his man….