Lord Vetinari wants to overhaul the banks of Ankh-Morpork so he appoints former con-man Albert Spangler, aka Moist von Lipwig, to the position of Mater of the Royal Mint, attached to a senior post at the Bank of Ankh-Morpork. Then Mrs Lavish, the bank manager, dies, leaving her dog Mr Fusspot, who happens to be the majority shareholder, to Moist.