1914. While their men fight in France, at home in Britain women are finally seizing the opportunity to make a difference. Maggie and her new friends Annie, Irene and Sarah come from very different backgrounds, but they've got one thing in common: they've all signed up for the Women's Police Volunteers. They can't wait to show the men just what they're made of. But soon, Maggie realises she's in over her head. Hiding her involvement with the WPV from her tyrannous father is becoming ever more difficult, and when she bumps into an old acquaintance with a big chip on his shoulder, the dangers of her new life become all too clear.