Daughter Of Darkness (1948)

Emmy (Siobhan McKenna), a pretty young Irish girl, gets a job on an English farm owned by the Tallent family. The local men take to her but the women don't, objecting to her flirtatious nature with their men and one woman, Bess Stanforth (Anne Crawford), is especially disturbed by her. When Dan (Maxwell Reed), a man from Emmy's past, shows up and accuses her of having tried to kill him Beth's suspicions are further aroused, and they're confirmed when Dan is found murdered in a local barn. Beth sets out to find out exactly who Emmy is and to prove that she murdered Dan. Also with Barry Morse (of Space: 1999 fame) and Honor Blackman (Cathy Gale in the original Avengers, before Diana Rigg took over the role.)