A strange group of ghosts plague the grave yard, only seen under the light of the full moon and known to drive most men mad that hear their gibbering speech.
(A simple plug in side-quest with a twist, that is left a little generalized to fit in with any fantasy campaign with minimal prep work by a gm.)
Five men are herding fifteen horses down the road. They won't be very talkative, but are willing to sell a horse, or more horses if the heroes are interested. These men are horse thieves. They are already sought by regional militiamen. Anyone with a stolen horse (all are marked) may get into trouble. If found guilty, horse thieves face prison or even a hanging execution. Similar thefts have happened only a month before, and a reward is offered.