Schoolmarm Mademoiselle has become a popular figure amongst the close-knit population of the small, rural French town in which she teaches. Adored by the children she educates and admired by their parents, she has become a true pillar of the community. But underneath her buttoned down respectability and calm, sensitive demeanour, Mademoiselle is wrought with deep, dark and twisted desires. The object of her warped affections is Manou, a promiscuous, local lumberjack. Unable to confront her repressed sexuality, Mademoiselle is driven into a state of psychotic malice, secretly terrorizing the village with acts of arson, flooding, death and an ultimately disturbing conclusion.