Hannah Albury is not like other girls in the turn-of-the-century Boston orphanage where she grew up. Instead of seasickness, she gets land-sickness. Billowing waves exhilarate her, but flat plains away from the ocean leave her dried out, parched, and ill. She leaves a ring of salt in the tub when she bathes, and sometimes she sees a faint tracing of scales on her delicate feet. It's freakish, horrifying, and deeply thrilling. As Hannah becomes a young woman, she can sense that a powerful change is coming. A choice lies ahead, and Hannah must discover if she is a creature of the land — or of the sea.