Unconventional and free-spirited, Amanda Giles has one grand ambition - to live as a "Bohemian" in New York, and fulfill her dreams as an artist. But first she must honor a deathbed promise to her brother and deliver vital papers to his Union army encampment. There, she agrees to become a spy for the Union, much to the chagrin of Captain Daniel McGrath, her new "partner" in an undercover mission that will put their lives - and their hearts - on the line.