The Protestant Sir John Chester and the Catholic Geoffrey Haredale have been feuding for years. In "Romeo and Juliet" fashion, Chester's son and Haredale's niece wish to marry, but their relatives oppose the union. A tale of love and intrigue set against the historical events of 1780, when an anti-Catholic mob caused more damage to London than had ever been seen before. And the simple young man Barnaby who becomes caught up in events he does not quite understand.