Elizabeth's reign is reaching its winter and England's old adversaries are fading. But in a world on the brink of change, showing any weakness can be fatal...

1598. Nicholas Shelby, unorthodox physician and reluctant spy for Robert Cecil, has brought his wife Bianca and their child home from exile in Padua. Welcome at court, his star is in the ascendancy. But he has returned to a dangerous world.

Two old enemies are approaching their final reckoning. England and Spain are exhausted by war. In London, Elizabeth is entering the twilight of her reign. In Madrid, King Philip of Spain is dying. Perhaps now is the time for one last throw of the dice.