The Devil's Bath has been immortalized in literature, most notably in Thomas Hardy's novel "Tess of the d'Urbervilles" (1891). In the book, the lake is described as a place of dark, foreboding beauty, where the protagonist, Tess, has a fateful encounter. Hardy's vivid descriptions of the lake helped to cement its reputation as a place of mystery and intrigue.
Set in an isolated, forested region of Upper Austria in 1750, The Devil’s Bath follows Agnes (Anja Plaschg), a deeply pious and sensitive young woman who marries into a cold, joyless farming household. Her new life consists of backbreaking labor, emotional neglect, and a complete absence of intimacy. Desperate for a sign from God, she descends into what modern psychiatry would recognize as severe postpartum depression and psychosis—but in her time, is seen as demonic possession or melancholia. Trapped between her own religious fervor and a society that offers no outlet for female suffering, Agnes commits a shocking act: the murder of an innocent child. In 18th-century Europe, this was not an act of rage but a twisted path to salvation. By committing a mortal sin and confessing it fully, she believes her soul will be cleansed and she will ascend directly to heaven—a documented historical phenomenon known as "mercy killing to achieve martyrdom" or, colloquially, The Devil’s Bath . the devils bath