May, 1937, and London prepares to crown a new king. Bestselling writer Josephine Tey is in town to oversee a BBC radio production of her play, but adultery, treachery and pent-up jealousies are stalking the corridors of Broadcasting House. At the height of the Coronation celebrations, Detective Chief Inspector Archie Penrose is called in to investigate the murder of one of the BBC's best-known broadcasters. A second victim - his mistress, and the...

London, 1903. Two women are hanged in Holloway Prison for killing babies. More than 30 years later, their crimes resurface with shocking consequences.