Meridan is a fairly wealthy but descreet town hidden in a field beond a mountain pass. Very much like it’s own city-state, it is not at war, nor troubled within itself. Crime is low, but existant, and the royal family there Governs well.
To this town comes a powerful wizard. He aims to subtly but swiftly irradicate the entire town. Fairly secluded, the wizard would have time to steal a hoard of treasure he believes to be hidden under the town (though you don’t know this). A master of illusions, this wizard can hypnotise, take over, and manipulate all sorts of people within the story.
Some of you were hired by the royal family to protect the town.
Others want to protect thier heritage, and others want to make some gold. Perhaps you are an assiassin from another region, or have a private agenda with the wizard.
For whatever reason, you all meet, and your party are now required to track down this devious wizard and put him to peace, before the town is lost.
First, design your characters, why they’re there, and what thier busness is. Then, play out your roles as you meet, and fro there move forward.
Later in the plot:
Maby the widard has several underling you need to fight, or a legion perhaps. Maby skeletons and golems, and other creatures he himelf creates. Characters may be manipulated or be the victims of illision, making the party’s trust shaky.