Fatal Woman, also known as Black Widow, follows Broadway producer Peter Duluth as his platonic friendship with a young, demure aspiring writer, Nanny Ordway, turns deadly when she's found strangled in his apartment, making him the prime suspect, especially when it's revealed she was pregnant and falsely claimed to be his lover, forcing Duluth to unravel Nanny's manipulative web of lies from beyond the grave to clear his name.