Alea Arcana: The Windmill Turns

From the introduction: War rages across the kingdom. Knights fight alongside wizards looking to save their country and their homes. Hundreds of settlements have been lost already and the princess has just been captured. Intensely focused on rescuing the king’s daughter, the army doesn’t see that the enemy forces have lured them away from an old ruined windmill. Janessa, a local druid, recognizes their devious ploy and gathers bold adventurers to find out what might lie within the abandoned structure and why the enemy doesn’t want it discovered... A 3-4 hour adventure for 1st level characters