In 1780, Loyalist Rowena Marsh insists on spying for the British during the American Revolution. As a girl, she must dress as a boy, plus endure devastation and murder as she decodes messages for a mysterious Welshman. The tide has turned in the rebels' favor. General George Washington appears to be winning. The loyalists are bombarded by threats and lost battles. Rowena stays determined to aid the British cause and preserve her family as they're chased from their Pennsylvania home.