The people of the Duchy of Brabant are divided by quarrels and political infighting; also, a devious hostile power left over from the region's pagan past is seeking to subvert the prevailing monotheistic government and to return the Duchy to pagan rule. A mysterious knight, sent by God and possessing superhuman charisma and fighting ability, arrives to unite and strengthen the people, and to defend the innocent noblewoman Elsa from a false accusation of murder, but he imposes a condition: the people must follow him without knowing his identity. Elsa in particular must never ask his name, or his heritage, or his origin. The conspirators attempt to undermine her faith in her rescuer, to create doubt among the people, and to force him to leave.