On February 16, 1929, wealthy and prominent oil man, Edward "Ned" Doheny, Jr., was found dead in a guest bedroom along with his long-time employee, T. Hugh Plunkett. Doheny had just built his colossal mansion, named Greystone, in 1928, and had not lived there long. What happened that night? Were these deaths related to an earlier scandal? Welcome to Nightmare Houses.