Irreversible pressure mounts throughout Mary André's espionage efforts on behalf of George Washington as the American Revolutionary War persists across the colonies. Her growing convictions for the rebel cause and deepening love for enemy officer Benjamin Tallmadge place her at odds with her outward loyalty to the British crown and her brother. Just one marginal maneuver could not only end the war but also end the lives of thousands. As she uncovers the British plot for capturing West Point, Mary realizes that a sacrifice must be made.