Some bases of history are the background of the story of Mary Johnson, a daughter of one of Sir William Johnson's marriages, and the results of her taking the place of her father's Indian wife, Molly Brant, when it was necessary to try to hold the tribes loyal to the English. Mary has been promised to an Irish relative, Guy, and was just as disinclined to arranged marriage as he, so when Guy was taken in by General Shirley and the traitorous Lydius and Genevieve, his loyal French wife, on his way to Uncle William, Mary is captured by the cruelly vicious Captain Joseph Castine de St. Castine. Rather than lose her life she becomes his mistress, escapes to the friendly Mohawks at the British outpost, Fort Oswego, and tries to take Molly Brant's place. There she meets Guy, they realize they were fools to try to avoid each other; they are separated after the fall of the forts, Ontario and Oswego, with Mary kidnaped by St. Castine and spirited to Acadia. Guy, helped by the vengeful Indians in a bloody foray, arrives in time to prevent her marriage to St. Castine. The threat of French victory, the betrayal of the British soldiers and the Indians, the treachery of trusted British, and recognized historical names are necessary passports for an overbalance of sensationalism, which may have a synthetic dramatic appeal.