While her sister fights to hold on to the family legacy, Louisa Highwood works tirelessly to save the lives of wounded soldiers. Putting her own safety on the line, she covertly ventures behind enemy lines to procure desperately needed supplies for the army hospital in Richmond, Virginia. Meanwhile, Jesselynn Highwood and her ragtag band of freed slaves and Thoroughbred horses seek refuge along the Oregon Trail, unable to imagine what awaits them.