"Luke isn't like most other 11-year-olds -- he can't speak and he mostly lives in his head. But today he'll go far out of his comfort zone when his parents take him on a train to see a parade. Luke must face all of his greatest fears: masks, dogs, and the unknown. When he's separated from his parents at the parade, Luke goes where he's the best version of himself--his imagination. Transforming into superhero ThunderBoom, Luke is determined to stomp his way through any menace."-- Provided by publisher.