Sixteen-year-old Sarah Louisa Wheelock has a strong independent streak and she's determined not to hide it, even though she's living in the 1800s. Soon her courage and determination has her leaving her family's farm and disguising herself as a man so that she can join the Union army during the Civil War. She makes such a name for herself as a nurse, and as a good mimic, that she is asked to become a spy. Once again, Rinaldi brings history alive via an exciting, empowering story.