Amazingly, former arch-swindler-turned-Postmaster General Moist von Lipwig has somehow managed to get the woefully inefficient Ankh-Morpork Post Office running like . . . well, not like a government office at all. Now the supreme despot Lord Vetinari is asking Moist if he'd like to make some real money. Vetinari wants Moist to resuscitate the venerable Royal Mint--so that perhaps it will no longer cost considerably more than a penny to make a penny.
Moist doesn't want the job. However, a request from Ankh-Morpork's current ruling tyrant isn't a "request" per se, more like a "once-in-a-lifetime-offer-you-can-certainly-refuse-if-you-feel-you've-lived-quite-long-enough." So Moist will just have to learn to deal with elderly Royal Bank chairman Topsy (ne Turvy) Lavish and her two loaded crossbows, a face-lapping Mint manager, and a chief clerk who's probably a vampire. But he'll soon be making lethal enemies as well as money, especially if he can't figure out where all the gold has gone.