In 1919 Mrs. Greenwood died in her home in Kidwelly. It was sudden, but the doctor put it down to heart failure. The nurse thought otherwise. A few months later, Harold Greenwood, her husband, married a much younger woman. Tongues began to wag. The police investigated. Arsenic was found in the corpse.

Greenwood had the means, opportunity and motive. The jury at the inquest found him guilty. He was put on trial for the murder of his wife. But was he guilty? Did a flawed investigation lead to a miscarriage of justice? This is the first full length meticulously researched book about this mystery, set in the 1920s in the social world that could have been that of an Agatha Christie story.