It was a long day for Nova and her brother Percy. They were on the school bus on the way to the Metropolitan Museum of Art. Nancy Bobofit, a bully, was throwing pieces of peanut butter ketchup sandwiches at Nova and Percy's best friend Grover and making fun of him. Grover is a small lanky kid who walks with an obvious limp, due to a muscle malformation, or so he says for Nova can tell that he is something more.