Really Important Luggage is a magazine story.
Thomas and his coaches wonder what is in the important-looking passenger's briefcases. Later, a man at the travel agency cannot open his case and at the same time a banker cannot open his, either. At lunchtime, they both go to Elsbridge's lost property office and find that they have accidentally taken each other's case. They open them to make sure and Thomas, Annie, and Clarabel find out what they keep in their cases - their lunch!