When Arthurs 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 crusheduntil the postman sets things right again the day before Busters scheduled return.When Arthurs 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 crusheduntil the postman sets things right again the day before Busters scheduled return.