The Battle of Bull Run proved a devastating loss for the Union. For Major Rand Hudson, the forced retreat inspires him to redouble his efforts: with heightened intensity, he is determined to prepare his men for their next encounter with the Confederates. Meanwhile, Rand's sister Lizzy has focused her work on the Underground Railroad. Her status as a major player in the war effort intensifies when she is recruited to work as a spy behind enemy lines. Confident in her ability to help the cause, she eagerly accepts. But as North and South collide, victory will not prove so simple—for behind the front lines on both sides are individuals who are fighting for their beliefs, their homes . . . their very lives.