Former Postmaster General Moist von Lipwig finds himself working at the Royal Mint of Ankh-Morpork, where he makes money and enemies while finding out who is stealing from the mint.
A step-by-step description of what happens to mail from the time it is deposited in the mailbox to its arrival at its destination. Also includes brief historical facts about mail service in the United States.
While his mother is looking for food and his father is tending their egg, a young penguin named Milo is charged with delivering the mail, not knowing that he is about to make a very special delivery.