When Frank Thompson sees a poster calling for new recruits for the Union army, he does not hesitate to enlist. But Frank is hiding a massive secret. He is not actually a man at all. He is really Sarah Emma Edmonds, a fiercely independent nineteen-year-old who has been living in disguise to escape a terrible arranged marriage. Desperate to fight for her country during the Civil War, Sarah joins a Michigan infantry regiment and proves herself to be an exceptional soldier. After taking on the grueling job of nursing the wounded, her incredible heroism catches the attention of military leaders. Soon, she is asked to cross enemy lines and infiltrate a Confederate camp as a master spy. Discover the breathtaking true story of one of history's bravest and most unlikely heroes.