Fiske Cahill isn't like his older sister, Grace. Risking his life isn't his idea of a good time. But he's a Cahill , and being a member of the world's most powerful family means that sometimes, you have to do things that scare you . . . like sneaking onto a nuclear submarine. But being trapped underwater with the most destructive weapon in history is only the beginning. There's someone looking for Fiske someone prepared to eliminate him at any cost.