Eleven-year-old Bailey believes in miracles. She has to; it will take a miracle to keep her warring parents together. This summer they are at a Marriage Counselling camp, leaving Bailey and her little brother Kevin with their estranged grandmother in the island town of Felicity Bay. There, an eccentric deposed minister makes a prophecy that a stranger from the sea will change everything. When Bailey discovers a mermaid-shaped piece of driftwood, she begins to believe that the mermaid is this stranger from the sea. Then, when a dolphin becomes stranded on the beach, Bailey forgets her own troubles and rouses the reluctant locals into action.