This is an apprenticeship novel, the story of Isabel Cooper, 17, and her 15-year-old brother, Frederick. In early 1911, they leave their Georgetown home after the sudden death of their Mexican mother. They are determined to find their father, a college professor who – like many American leftists – had joined the Mexican revolution a few months earlier. They travel by train, stagecoach, and wagon, at first put off by what they see of turn-of-the-century American South. But they soon learn of the quiet dignity of their mother's homeland. After an ugly incident not of their making, they escape the federales with the help of Pepe, a lad of many talents. He leads them to refuge with a ragtag militia on its way to join Carranza's Army of the North, commanded by a woman known as La Maestra