Mischievous Monsters
Several leagues off the main road is a portal to the realm of fairy; a ring of standing stones resting in a clearing surrounded by ancient trees. Once a year¸ from the full moon to the next full moon¸ this portal opens and allows the fairies to cross over¸ to wreck havoc and cause mischief in the mortal realm.
This adventure pits the characters against a group of mischievous fairies¸ who raid the inn the characters (henceforth¸ the Party)are staying at and steal the goods of a wealthy trader. The trader hires the Party to track the thieves down and recover his goods¸ and awards them handsomely to do so.