The Corruption of Alder Glen" is a folk horror adventure that takes place in a small, close-knit town with a strange relationship to their trees. Characters have the chance to get to know the town and its inhabitants while they unravel the mystery of the gravedirt alder and decide how best to save the townsfolk — and themselves. This 5th edition compatible adventure was written for a party of four to six 4th level characters. By the end of the adventure, characters should reach 6th level. The adventure sees the characters pass through the modest town of Alder Glen and witness a bizarre wild animal attack. When they are asked to get to the bottom of these escalating attacks, they uncover a centuries-old bargain with the creatures of the wood. The widow Blanche, Lady of Alder Glen, and her daughter Ingrid disagree on how best to protect the people in their charge. As the wood encroaches, they’re running out of time to decide.