Watch Lake Mungo full movie online Movies123. Watch Lake Mungo 123movies online for free. Lake Mungo 123Movies: After 16-year-old Alice Palmer drowns in 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 psychic and parapsychologist, who discovers that Alice led a secret, double life. At Lake Mungo, Alice's secret past emerges.