Sarah Agnes Prine begins her diary in 1881 when her father decides to move the whole family - and their horse ranch - from Arizona Territory to Texas, where life will be easier. Sarah, at seventeen, is a tomboy: though she longs to be educated, gracious and beautiful like other women. But when the family sets out on the wagon trail and disasters strike in rapid succession, Sarah turns out to be the only thing that keeps them from certain death.

Sarah stays brave, strong and determined through everything that befalls her. But she longs to be loved, like any other woman, and she is to meet her destiny in Captain Jack Elliot.