Suddenly, condemned arch-swindler Moist von Lipwig found himself with a noose around his neck and dropping through a trapdoor into ... a government job? By all rights, Moist should be meeting his maker rather than being offered a position as Postmaster by Lord Vetinari, supreme ruler of Ankh-Morpork. Getting the moribund Postal Service up and running again, however, may prove an impossible task, what with literally mountains of decades-old undelivered...

A talking cat, intelligent rats, and a strange boy cooperate in a Pied Piper scam until they try to con the wrong town and are confronted by a deadly evil rat king.