A young governess arrives at a remote country estate to care for two orphaned children, only to become convinced that the grounds are haunted by malevolent spirits. Tasked with the children's education and well-being, the protagonist finds her objective complicated by the children's increasingly strange behavior and her own growing paranoia. The narrative framework is presented as a manuscript read aloud to a group, creating a layer of distance between the reader and the events. The story operates within the strict social constraints of Victorian England, where the governess's authority is constantly tested by the enigmatic nature of her charges and the isolation of the Bly estate.

Discussion often centers on the ambiguity of the supernatural occurrences and whether the ghosts are literal entities or manifestations of the governess's deteriorating mental state. Readers frequently highlight the effectiveness of the prose in creating a sense of unease without relying on overt horror tropes. Critics often examine the power dynamics between the governess and the children, noting how the narrative forces the reader to constantly re-evaluate the reliability of the narrator. The work remains a foundational text for those interested in psychological suspense and the limitations of human perception.