A selchie, a seal transformed into human form, lives on land with a lonely fisherman and his wife, until the day a great storm threatens the fisherman's life.
Though her father seeks to protect her from all unpleasant things, a young princess is intrigued by the voice of the wind that tells her of worlds beyond the palace walls.
During a dinner party, the lights go out and Mrs. Reynard's beautiful diamond necklace is stolen, but Piggins the butler quickly discovers the real thief.
Relates Sally Jane's experience of changing times in rural America, as she lives through the drowning of the Swift River towns in western Massachusetts to form the Quabbin Reservoir.