Polly is the story of a horseshoe crab who discovers a sky full of stars on the night that she hatches, and wants to know more about what she sees. Not satisfied with the answers she gets from the other creatures of the sea, she sets out on her own to discover as much as she can. Her curiosity leads her to many amazing discoveries above the water, including the strange and enigmatic "two feet" that live there - but when one of those encounters...