England, 1538. A bloody power struggle between crown and cross tears England asunder. Young Joanna Stafford has already tasted the wrath of the royal court, seen what lies inside the king's torture rooms and escaped death at the hands of those desperate to possess the power of an ancient relic. After seeing such sights, the quiet life is not for Joanna. Soon she risks arrest and imprisonment again, when she is caught up in a conspiracy scheming against Henry VIII. As the powerplays grow deadly, Joanna must realise if her role is more central than she'd ever imagined. As one fateful night at the shrine of Saint Thomas Becket proves, she must make a choice between those she cares for most and taking her place in a prophecy foretold by three different seers, each more powerful than the last. To learn the final, sinister piece of the prophecy, she flees across Europe with an amoral spy sent by Spain. As the necromancers complete the puzzle, Joanna realises the life of Henry VIII as well as the future of Christendom are in her hands; hands which must someday hold the chalice that lies at the centre of these deadly prophecies ...