When ArthurÔÇÖs best friend Buster leaves town to visit his father for a month, Buster promises to send postcards to Arthur. Every day Arthur looks for a postcard in the mail, but finds nothing from Buster. When Arthur learns that all his friends at school have heard from Buster, Arthur is crushed - until the postman sets things right again the day before BusterÔÇÖs scheduled return.