Inspired by the remarkable life of Dorothy Peto, the Metropolitan Police’s first female superintendent.

Even in war, your enemies can linger too close to home …

While war and revolution continue to ravage Europe, Dorothy Peto embraces her new role at Scotland Yard as she and several detectives investigate a series of jewel thefts. Then Dorothy is tasked with assisting the inscrutable Inspector Derwent and the charming Colonel Cartier to find a missing French aristocrat.

Their enquiries take them to a country house in Yorkshire, that’s been converted to a hospital for wounded soldiers and was the last place the Frenchman visited.

However, the more questions they ask, the more questions they have.

When the body of a man suspected of being the marquis is discovered, the investigative team returns to London, but the dead man is a stranger. Dorothy speculates that the death, the jewel thefts and the missing Frenchman may be connected. She finds herself tangled in a web of conscientious objectors, Irish republicans and communist agitators, and not everyone is who they appear to be.