They were teachers, students, chemists, writers, and housewives - a singer at the Paris Opera, a midwife, a dental surgeon. They distributed anti-Nazi leaflets, printed subversive newspapers, hid resisters, spirited Jews to safety, transported weapons, and conveyed clandestine messages. The youngest was a schoolgirl of 15 who scrawled "V" for victory on the walls of her lycee; the eldest, a farmer's wife in her sixties who harbored escaped Allied airmen. Strangers to one another, hailing from villages and cities from across France, these brave women were united in hatred and defiance of their Nazi occupiers.

Eventually the Gestapo hunted down 230 of these women and imprisoned them in a fort outside Paris. Separated from home and loved ones, these disparate individuals turned to one another, their common experience conquering divisions of age, education, profession, and class as they found solace and strength in their deep affection and camaraderie. In January 1943, they were sent to their final destination: Auschwitz. Only 49 would return to France.

A Train in Winter draws on interviews with these women and their families; German, French, and Polish archives; and World War II resistance organization documents to uncover a dark chapter of history that offers an inspiring portrait of ordinary people, of bravery and survival, and of the remarkable, enduring power of female friendship.