To get away from city life periodically, New Yorker Roger Locke purchases an abandoned farm house in rural Connecticut, and with the assistance of his cousin Phillida and her beau Ethan Vere, he sets about fixing up the place. Immediately however, an unseen mysterious woman begins giving him warnings during nocturnal visits to leave the house at once. Soon he begins hearing strange ominous sounds emanating from the tiny lake at the back of the house coupled with a permeation of sickly odors. ...