Commander Mark Bishop is deliberately low-key. But commanding a missile submarine, keeping the crew trained and alert during long patrols, and being prepared to launch on presidential orders carries a burden of command like few other jobs in the military. Mark Bishop is a man who accepts that responsibility and handles it well. And the Navy is glad to have him. But Mark wants someone to come home to after sea patrols. The woman he has in mind is young, with a lovely smile, and very smart. She's a civilian, yet she understands Navy culture. And he has a strong sense that life with her would never be boring. But she may be too deep in her work to see the potential in a relationship with him. Gina Gray would love to be married, having always envisioned her life that way. A breakup she didn't see coming, though, has her focusing all her attention on what she does best--ocean science research. She's on the cusp of a major breakthrough, and she needs Mark Bishop's perspective and help. If she's right, submarine warfare is about to enter a new and dangerous chapter.