Eleven-year-old Isabel is a "plain old" girl living in Provincetown, Massachusetts, who believes that she is destined to accomplish something special. When her fifth-grade class goes on a whale-watch field trip, something amazing happens: Dozens of different species of whales surround the boat, bumping the deck and sending Isabel flying into the ocean. Isabel is shocked to hear the whales speaking to her--she is a mermaid, they tell her, a "Chosen...