When Dominic's children are kidnapped by raiding pirates, Gabrielle and Féolan find themselves drawn into their most frightening adventure yet, a sea journey into unknown lands. The adventure takes a deadly turn when the Gray Veil, a plague that slowly chokes its victims, strikes the harbor town where the children have been taken. Gabrielle's healing powers are needed as never before, and in the end, it seems, she must choose: She can only save one, her husband or her niece.