On the night of 3 October 1922, in the quiet suburb of Ilford, Edith Thompson and her husband Percy were walking home after an evening spent at a London theatre, when a man sprang out of the darkness and stabbed Percy to death. The assailant was Frederick Bywaters, a twenty-year-old merchant seaman who had been Edith s lover. When the police learned of his relationship with Edith, she was arrested as his accomplice, despite protesting her innocence. The remarkably intense love letters Edith wrote to Freddy – some of them couched in ambiguous language – were read out at their trial for murder at the Old Bailey. They would seal her fate: Edith and Freddy were hanged for the murder of Percy Thompson in January 1923. Freddy was demonstrably guilty; but was Edith truly so?

In shattering detail and with masterful emotional insight, Laura Thompson charts the course of a liaison with thrice-fatal consequences, and investigates what the trial and execution of Edith Thompson tell us about perceptions of women in early twentieth-century Britain.