A mermaid haunts Adrianne's dreams . . . is she coming to warn her, save her, or drag her down into the depths of the briny sea forever? When Adrianne comes face-to-face with the mermaid of Windwaithe Island, of whom she has heard terrible stories all her life, she is convinced the mermaid means to take her younger sister. Adrianne, fierce-willed and courageous, is determined to protect her sister from the mermaid, and her family from starvation. However, the mermaid continues to haunt Adrianne in her dreams and with her song.