The summer after Andi Carter turns nine, the circus comes to town. Andi can't wait to get in line to see the elephants, the acrobats, and-most of all-the champion bareback rider. What could be more thrilling than riding your very own horse under the big top? Then she meets Henry Jackson, a small boy selling circus treats. Andi thinks his job must be perfect. He gets to spend every day with happy clowns, exotic animals, and excited visitors. But it's not all fun and games. Henry shares a secret with Andi. He ran away from home to join the circus—and now he's trapped. Andi wants to help him get home. But helping him may mean losing something very special to her.