When Amanda discovers that her estranged, abusive father needs a transplant to save his life, and she is the only match, she is forced to confront her painful past and make the decision that will decide her future.

12-year-old Ryan moves to the town where her father was born—a bleak, dying fishing town. However, exploring the coast, she discovers a cove that is home to a mysterious girl named Coral who reveals herself to be a mermaid.