After restless Roberta (aka Bert) Lenehan comes to Portsmouth Island, N.C., to volunteer for the National Parks Service, she finds the body of a woman in the island's marsh; a previous park caretaker had met a different mysterious end. In B.J. Mountford's Sea-born Women, Bert tries to uncover the truth does the island hide a deadly treasure-hunter? Is a long-dead pirate guarding his grave? How does the legend of the Sea-born Woman relate to the crimes? as bad weather threatens and romance with a younger man blossoms.