Churning Waters tells the story of young Marguerite Westley, a heroine that discovers her family tree holds a secret link to the world of the Sironians - an underwater race of dark and powerful beings. The stunning beauty of these sirens can only be matched by the danger they represent. Marguerite must struggle to understand how she, a half-breed, fits into this new and mysterious world. Along the way, Marguerite is inevitably drawn to William Avery, a powerful young Sironian sworn to watch over her and keep her safe from those Sironians who would destroy her for what she represents. As their reluctant attraction turns to romance, Marguerite must prepare herself for a climactic collision between the human world of her past and the Sironian world she has now embraced.