The Pied Piper of Hillthorpe
The village of Hillthorpe has been under the "protection" of a rough sleeping stranger. The extortion began with demands for a bushel of wheat or a basket of apples, accompanied by threats of rats and mice being sent to ravage the sick and sleeping, and to ruin the stores.
Over time, the demands escalated, reaching the point where the village could no longer afford to pay without starving to death over winter (3 sacks of grain, a barrel of ale, and all the ripe cheese you have each week!). As a result, the village is seeking outside help.