Joyce can't believe she committed suicide and begins to look for the truth. His suspicion falls on Ann's sister-in-law Kate (Pamela Mason). Kate is a rather unpleasant selfish and money-grabbing young woman. Joyce begins a relationship with Kate with the aim of killing her the same way she caused Emma's death...
Not everything goes to plan of course. The film ends with a number of twists, it maybe ruins in some way the noir film film by becoming a bit of a melodrama. The performances are superb especially by Mason portraying a man who assumes he is sane and dispensing justice and not a crazed criminal but is he really any different? At the end we know the answer.
