Act as an experienced screenwriter with a background in psychological thrillers. Develop a script about a seemingly idyllic [SMALL TOWN NAME] where a [NEWCOMER/OUTSIDER] uncovers a series of disturbing secrets tied to the town's [ANNUAL FESTIVAL/TRADITION]. The story should explore themes of [LOYALTY VS. TRUTH/COMMUNITY VS. INDIVIDUALISM] while maintaining an eerie, slow-burn tension. Include at least three key twists, a morally ambiguous protagonist, and a climactic scene where the town's darkest secret is revealed in a shocking way. Ensure the setting feels vivid and oppressive, with supporting characters who each hide their own [GUILT/COMPLICITY] in the town's history.