Stop evil cultists of the Crushing Wave. The party rescues a member of the Brotherhood of the Cloak in Mulmaster (local mage guild); Drayson Fivestar. Drayson asks them to investigate the murder of his colleague. After some urban investigation, the investigation leads to a former guard tower of the Zhentarim, now occupied by elemental cultists. The tower was submerged in mud, but recently uncovered. The party faces of with the cultists. (Large page count, but feasible as a one shot after some editing, will probably take two sessions at most)
Guilds Town is in the middle of Dravens, a province of the realm of Shrave. 50 years ago, the neighboring dwarven province of Kiernard rebelled and tried to overthrow the green dragon Shrave who rules the realm. They failed and their province was dissolved. Dwarves who left the province mostly fled to Dravens, and are called Nards as both a racial slur and a stigma of their people’s dishonor. Guilds Town are the ones really in control of the province and are the current opposition of the Dravens nobility. In recent times, corruption and crime in the city have risen to new heights as 4 cults compete for control of the city and their citizens.