While Thomas and Percy wait for an important cargo ship at the docks Thomas suggests a game of Hide and Peep. Cranky wants to play but Thomas tells him that he'd be no good at hiding. Percy hides and Thomas looks for him everywhere. When he can't find Percy, Thomas announces loudly that Sir Topham Hatt has arrived. Percy comes out from his hiding place but is cross when he realizes that Sir Topham Hatt hasn't arrived - Thomas has cheated. Percy hides again and Thomas searches for him. The Dock Manager says that the cargo ship has arrived. Thomas calls for Percy to tell him the news but Percy doesn't believe him and stays hidden. Thomas asks Cranky to help him find Percy. Cranky quickly spots Percy. Thomas puffs over to him and tells him all about the cargo ship. Thomas tells Percy that he is the best hider and that Cranky is the best finder! Toby is given a special job - to take Alicia Botti the opera singer to a special concert. Toby worries about making a mistake. Toby worries so much that he does just that - he forgets to slow at a corner, spilling Alicia's special tea in Henrietta. Then he worries so much that he takes the wrong track. Finally he worries so much that he speeds through a big puddle covering Henrietta in mud. When Alicia Botti sees Henrietta she insists that Toby gets washed. At the wash down, Toby notices the workmen are cheerful and how nobody else is worrying. Later, Toby doesn't worry anymore. And he does his job perfectly!