After 16-year-old Alice Palmer drowns at a local dam, her family experiences a series of strange, inexplicable events centered in and around their home. Unsettled, the Palmers seek the help of a psychic and parapsychologist, who discovers that Alice led a secret, double life. At Lake Mungo, Alice's secret past emerges.

Features new interviews with the cast and crew, along with expert opinions and unearthed behind-the-scenes footage, to explore the enduring legacy and creepy realism of the mockumentary.