In the court of King Stephen of England in the year 1136, there is a cunning courtier called Greta the Witch. Greta has a terrible vision of the future and a vision of a strange silver man, a traveler from another world. The king has a secret of his own and plots an elaborate deception. Greta follows the king and two of his men-at-arms, and the four of them encounter the silver man while he is monitoring mankind's progress. The silver man freezes...