-An NPC merchant selling insects and other creepy crawlies-
"You want horseflies? Giant wasp? Gigmucc has them all on his cart, Gigmucc has a discount just for you..."
Captain Aubrey surveyed the deck of the captured sloop. He was amazed that such well run ship could crewed by such a motley gang of men. He turned to the doctor and wondered, "No man is born into piracy. What were these many fellows before they took up the black flag? Surely they can not all share the same story."
What if the innkeeper knew what you wanted before you did?
It is a small, lively town like so many others. Do you wonder who are the movers and shakers here?
A vicious murder happens in a town that the party happens to pop in at. Under heavy suspicion as they are strangers, the party is forced to discover the perpetrator or have their reputations blackened, especially as more and more murders occur in the town, and mysteriously stop and restart when the party leaves to go kill off that evil necromancer who kidnapped the princess.
The only problem is that a demon, possessing one of the party, is the perpetrator. And the demon makes no signs that its living in the PC's head.
In fact, for all the party knows (except for the possessed person's), their companion is an evil murderer.
Do they try and execute their friend as he's a vicious murderer, and no evidence points to demonic posession? Or do they flee town with him, trusting him, and have their reputations destroyed?