Night of the Devils (1972)

In this adaptation of Tolstoy's story the Wurdulak, a mentally-ill patient known as Nicola (Gianni Garko) flashes back to horrifying experiences that he encountered while driving through the country. Upon damaging his car, Nicola sets out for help, only to meet a mysterious family who lives in total fear of someone or something. This evil force slowly penetrates the household and thrusts each of its members into a frenzy of absolute terror.