On a wild and windy day all the washing blows away. Socks and vests, a woolly hat, and far worse than all of that - Charlie's Superhero Underpants! Disaster! Charlie sets off around the world to find them. He discovers a fine French Fox wearing sister Sophie's Socks, he finds a pair of llamas, wearing brother Ben's pyjamas...But Who has got Charlie's Superhero Underpants?