Cut off from the rest of the world by a sinister curse, the people of Willowshore face the daunting possibility of a winter on their own. Stockpiling food, preparing for the change in seasons, and dealing with an increasing number of supernatural events take up the heroes' time as they work to make sure Willowshore is ready to face winter, but the true test lies along the ancient pathway leading west out of town. By taking this so-called Pilgrim's Path, the heroes of Willowshore can travel to an ancient monastery that, they hope, will contain clues as to how to defeat the curse. Yet what dwells now in the ruins may not part with its secrets willingly... "Let the Leaves Fall" is a Pathfinder adventure for four 4th-level characters. This adventure continues the Season of Ghosts Adventure Path, a four-part monthly campaign inspired by Asian horror in which a band of adventurers must protect their hometown from supernatural peril. This adventure also includes articles about a local autumnal festival and the reincarnation-focused philosophy of Sangpotshi, new magic items, spells, and rituals to be discovered, and a mix of supernatural monsters to menace your PCs. Each monthly full-color softcover Pathfinder Adventure Path volume contains an in-depth adventure scenario, stats for several new monsters, and support articles meant to give Game Masters additional material to expand their campaign.