In Washington City in 1862, President Lincoln rallies the Union troops for the largest single campaign of the Civil War. And two sisters from Seneca Falls take their places among the players of history, sparked by the fires of conviction...As part of the new special intelligence force of the Treasury, Bronwyn Llyr finds herself undercover and behind the lines. Her sister Kathryn volunteers as a nurse for the Union Army. In the heart of enemy territory and in the thick of battle, the two sisters must solve a baffling mystery, and thwart a Rebel conspiracy that threatens both their lives-and the entire outcome of the war...