On a rain-swept Sunday morning in February 1899, the peaceful Kentish village of Biddenden was shaken to its core when a six-year feud reached its devastating climax when Sunday school teacher John Whibley was shot dead in the local school. Superintendent Thomas Fowle of Kent Police is tasked with the investigation. Was this an act of calculated brutality by a heartless murderer, or a deluded woman's tragic attempt to fulfil what she believed to be divine will? What drove Bertha Peterson, a gentlewoman, to commit such an unthinkable act? Follow the story of a disturbed mind, shaped by dangerous beliefs and religious fanaticism, as it spirals into cold-blooded obsession. Could John Whibley's death have been averted? Could more have been done to stop the murderer's deadly path? The answers lie within this haunting true tale.