In the life of every person, there are difficult choices. Myoist von Lipwig—an extraordinary swindler, a master of art forgery, and a genuine specialist in fakes—now faces a heavy dilemma: be hanged or flip the Ankh-Morpork Postal Service upside down.
After making this tough, ambiguous decision, he must ensure that, despite rain, snow, dogs, and bad roads, despite the Friendly and Kindly Union of Postal Workers—painfully honest and ethical competitors—and midnight murders, the mail still arrives on time.