Mary André, sister to a prominent British officer, flees a despairing argument with her brother and loses her way, ending up in the enemy camp just as the American Revolution takes hold. Now Mary must make a powerful decision - to become a member of George Washington's ring of spies or risk being discovered as the enemy. Mary's choice will affect the outcome of the war, as well as unleash a series of consequences in her own life that she can't escape: will she risk her own brother's life to save thousands of revolutionary soldiers? Could she turn the course of the war in the revolution's favor? Will she be able to face the consequences of falling in love?