In 1582, England is gripped by the fear of traitors. Kate Lyon, tainted by her exiled mother's past treason, has been disowned by her father, Baron Thornleigh. But in truth, Kate and her husband Owen are only posing as Catholic sympathizers to gain information for Queen Elizabeth's spymaster. Kate is an expert decoder. The deception pains her, but she takes heart in the return to England of her long estranged brother Robert. If only she could be sure...