Norman Spencer, a university research scientist, is growing more and more concerned about his wife, Claire, a retired concert cellist who a year ago was involved in a serious auto accident, and who has just sent off her daughter Caitlin (Norman's stepdaughter) to college. Now, Claire reports hearing voices and witnessing eerie occurrences in and around their lakeside Vermont home, including seeing the face of a young woman reflected in water. An increasingly frightened Claire thinks the phenomena have something to do with the couple living next door, especially since the wife has disappeared without apparent explanation. At her husband's urging, Claire starts to see a therapist; she tells him she thinks the house is being haunted by a ghost. His advice? Try to make contact. Enlisting the help of her best friend, Jody, and a ouija board, Claire seeks to find out the truth of What Lies Beneath.