The Pursued

Marjorie had never seen a dead person until she got home one tranquil summer evening and found her sister's body. She looked peaceful, as if she was asleep. Their mother suspects, however, that Dot's death was far from natural. What's more, she's convinced she knows who the killer is. Slowly and meticulously, she plots her revenge. After all, who would suspect a neatly dressed, grey-haired widow of anything?