Sixteen-year-old Alice Palmer drowns while swimming in the local reservoir. When her body is recovered and a verdict of accidental death returned, her grieving family buries her. Then, they begin to experience a series of strange and inexplicable events centered in and around their home. Profoundly unsettled, the Palmers seek the help of psychic and parapsychologist Ray Kemeney. He discovers that Alice led a double life. A series of clues leads the family to Lake Mungo where Alice's secret past emerges. Lake Mungo is a mystery, a thriller and a ghost story told in documentary form that illustrates how the dead can forever haunt the living.