Seventeen-year-old Jane Grey was queen of England for nine days. Her father and his allies crowned her instead of the dead king’s half-sister Mary Tudor, who quickly mustered an army, claimed her throne, and locked Jane in the Tower of London. When Jane refused to betray her Protestant faith, Mary sent her to the executioner’s block, where Jane transformed her father’s greedy power-grab into tragic martyrdom. Meanwhile, Jane’s sister, Katherine, faces imprisonment in the Tower when her pregnancy betrays her secret marriage. What will happen when the youngest Grey sister, Mary --- the last Tudor --- defies her ruthless and unforgiving cousin Queen Elizabeth?