Upon the death of King Edward VI, the thirty-eight-year-old princess Mary—daughter of Henry VIII and Catherine of Aragon—wrests the throne from Edward's deemed heir. But Mary's mother appears from the vaults of memory, and adamantly questions the motives of Mary's cousin Jane and her half-sister Bess, despite Mary's affection for them both. As the kingdom splits along Roman Catholic and Protestant lines, Mary walks a gauntlet of squabbling ethics and politics, and is forced to make some tough decisions. Should she execute her opponents before it's too late, the way her father did? Should she scramble to find a husband who can give her a rightful heir? And can she trust her mother, her sister, or even herself?