Thirteen year old Layla Rae and her brother are sent off to their grandfather's ranch while their parents work on their crumbling marriage. Layla falls from her horse and breaks an ankle, becoming bedridden. She discovers a book about ancestors who lived in Philadelphia when the British occupied the city during the Revolutionary War. She goes on a thrilling ride with her very own Founding Mother, whose bravery helps save the Continental Army and, quite possibly, the American Cause for Liberty.