When an enigmatic epidemic sweeps through the sleepy commune of Fraize, transforming its inhabitants into monstrous reflections of their darkest fears, a courageous young schoolteacher embarks on a treacherous journey to uncover the origins of the plague. Facing adversity from both the supernatural threat and a town descending into chaos, she must unravel the malignant ties linking the past to the present, redefining what it means to be human in a world veering toward oblivion.