Flashback

Running from a proposal of marriage from Sherriff Paul Davidson, Anna Pigeon takes a post as temporary supervisory ranger on remote Garden Key in Dry Tortugas National Park, a small grouping of tiny islands in a natural harbor seventy miles off Key West. This island paradise has secrets it would keep; not just in the present, but in shadows from its gritty past, when it served as a prison for the Lincoln conspirators during and after the Civil War.

With a mysterious boat explosion -- and the discovery of unidentifiable body parts -- Anna finds crimes of past and present closing in her. A tangled web that was woven before she arrived begins to threaten her sanity and her life. Cut off from the mainland by miles of water, poor phone service, and sketchy radio contact, Anna must find answers before it's too late.