From publisher blurb:
Deep within the Fallen Fens a tribe of Lizardmen, backed by an unknown patron, plan war against the village of Waunku. Garith, the village's lawkeeper, is worred. A strange new drug called "Joy" has become popular with many in the town. Slowly the people are becoming addicted to the substance and work, play ... and defense of the village is eroding.
Can the adventurers brave the deep gloom of the Fallen Fens? Can they find who is behind the "Joy" drug?
Joy in a Flask is a Swords & Wizardry Compatible adventure for 3-5 players of the 2nd through 4th levels of play and should take between two and three hours to complete.