Lottie goes to swim lessons every Saturday, but she never gets in the water. That's because she is convinced there is a shark in the pool, a shark that wants to eat her and only her. But then Walter appears. Walter likes singing and reading books and bubble baths, and his favorite food is fish sticks, just like Lottie. When Saturday rolls around again, Lottie is no more ready to jump in the pool than she was before. Or is she? Sometimes it just takes a special friend to find the courage that was inside you all along.