Discworld: The Return of Ur-Gilash (Part I)

Part I of a Discworld DnD5e one shot to raise money for RICE, an Alzheimer's research charity for which Lady Pratchett is a patron, in the cobbled streets of Ankh-Morpork worshippers of Om are being murdered. In an attempt to save on spending any more coin  on the city watch's budget The Patrician, Lord Vetinari, has comissioned a group of would-be-criminals to investigate these murders. Fitted with Dibbler's finest gear (quality assured) and given the vague direction of where they could go, our heroes(?) set off to solve this mystery...