The show had an ensemble cast and revolves around four older single women (three widows and one divorcée) sharing a house in Miami. The owner of the house is a widow named Blanche Devereaux (McClanahan), who was joined by fellow widow Rose Nylund (White) and divorcée Dorothy Zbornak (Arthur), after they both responded to an ad on the bulletin board of a local grocery store a year before the start of the series. In the pilot episode, the three were joined by Dorothy's 80-year-old mother, Sophia Petrillo (Getty), after the retirement home where she had been living burned down.