Lord Vetinari, ruler of the city-state of Anhk-Morpork, has a problem that he must address immediately. The Postal Service in his city has become rather rundown and technological innovation seems to be leaving it behind. The Clacks, a type of visual telegraph system, allows people to send messages across great distances almost instantly, so nobody wants to use the Post Office any longer. Vetinari won't stand for this in his city, so he does what any shrewd ruler would do and offers the job of Postmaster General to a con-man who is on death row.  After all, who better to breathe new life into a dying institution?