Inspired by the remarkable life of Dorothy Peto, the Metropolitan Police's first female superintendent.
In 1914, the idea of a female police officer is dismissed as absurd, but to a small group of determined women, not impossible.
With men departing to fight for king and country, women have new opportunities at home. Dorothy Peto and her fellow suffragettes propose forming the Women's Police Volunteers to assist police keep order. At first, the suggestion is derided, yet the force is stretched thin. As Dorothy and her friends train and organise to help refugees fleeing the war and guide terrorised Londoners to shelter during the Zeppelin raids, the 'ladies in blue' gain a grudging acceptance.
