Marjorie, a young woman, arrives home one summer evening and finds her sister, dead, with her head in the oven. She looks peaceful, as if she is asleep. Their mother suspects, however, that Dot's death was far from natural - and that she knows who the killer is. So, slowly and meticulously, she plot...

Marjorie, a young woman, arrives home one summer evening and finds her sister, dead, with her head in the oven. She looks peaceful, as if she is asleep. Their mother suspects, however, that Dot's death was far from natural - and that she knows who the killer is. So, slowly and meticulously, she plots her terrible revenge.