August 1914. While Europe enters a brutal conflict unlike any waged before, the Duncan household in Baltimore, Maryland, is the setting for a different struggle. Ruth and Elise Duncan long to escape the roles that society, and their controlling father, demand they play. Together, the sisters volunteer for the war effort--Ruth as a nurse, Elise as a driver. Stationed at a makeshift hospital in Ypres, Belgium, Ruth soon confronts war's harshest lesson: not everyone can be saved. Rising above the appalling conditions, she seizes an opportunity to realize her dream to practice medicine as a doctor. Elise, an accomplished mechanic, finds purpose and an unexpected kinship within the all-female Ambulance Corps. Through bombings, heartache and loss, Ruth and Elise cherish an independence rarely granted to women, unaware that their greatest challenges are still to come. Illuminating the critical role women played in the Great War, this is a remarkable story of resilience, sacrifice and the bonds that can never be vanquished.