A single sheet of parchment and a silver key.
A secret passed down through generations.
A mystery waiting to be unlocked.
Before his death in 1609, the brilliant Elizabethan spy, astrologer and mathematician John Dee hid many of his papers, believing that the world was not prepared for the ideas they held. For seventeen generations, his female descendants have held his most precious secrets, waiting for the right moment to bring them to light.