Sally the sea otter lives in a kelp bed in Monterey Bay. She lives like every other sea otter except, Sally has learned that people can buy fish. The most valuable thing to Sally is the rock she uses to crack open crabs and clams to eat. On a boat dock, a man and girl sell fish to people. Sally has the idea of buying a fish with her rock. To her surprise, the man and girl sell her one in exchange for her rock. Everyone loves to watch the sea otter buying her fish each day.