Retired widows, Connie and Sable Butterworth, have set up a private investigating business. In this story, Connie's daughter, Debra, asks them to help one of her friends. Nerys and Dale Spencer have been together since they met at school. They are now happily married with children. Or so Connie thought. She is shocked to discover that Nerys has filed for divorce. After speaking to Nerys, Connie and Sable soon have misgivings about the solicitor Nerys hired. Before Connie and Sable can confront the solicitor, Bruno Ridgeway, they discover he's been murdered. And Dale Spencer is the prime suspect. Connie believes Dale to be innocent and sets out to prove it.