A Plague of Rats

From the publishers blurb:

In the bustling port city of Vystaanzport, where ships arrive with goods from distant lands, a peculiar disturbance has emerged. Reports speak of rats swarming the docks, threatening the flow of trade and commerce. The city officials, desperate to maintain order, have put out a call for capable individuals to address the vermin infestation. Unbeknownst to the party, this seemingly routine task will be the first thread in a much larger tapestry woven by unseen hands.