Third-grader Stuart, his parents, and his Aunt Bubbles just moved to Punbury. Stuart's worrying is only matched by his imagination, and both are XXXL. What if there are man-eating spiders in his new closet? He worries about getting lost, finding new friends, not finding the school bathroom in time, or getting stuck once he's there. One rainy, boring day, Stuart finds a box of old ties. He staples them all together and makes a wondrous, magical cape which leads him from one adventure to another. A dinosaur, a horse, and a gorilla come to play. Stuart can't keep his feet on the ground as the cape flies him up into the sky. And, then, there's the toast seeds and the body switch between his cat and the garbage man.