The second wife

Gwen Lake, a fofty-five-year-old police clerk in Duluth, Minnesota, is prompted by boredom to agree to a meeting with her ex-husband's new wife, and stunned when Marjory claims Brian, the gentle man Gwen was married to for over twenty years, had become violent, and when Marjory disappears and a dead body is later identified as hers, Gwen sets out to clear Brian's name.