What secret does the castle in the Eifel guard? Jerusalem, 1148: Three men share their booty after a successful crusade. In the face of a magic crucifix, they make a pact: to protect themselves and their own forever. Two hundred years later: Because of an impending feud, Elisabeth of Küneburg is sent to the care of friends. She enjoys life there - but then the plague breaks out. Her uncle Dietrich takes advantage of the turmoil to capture her parents' castle. He does everything in his power to marry his son, the sinister Albrecht, to her as quickly as possible. Will the descendants of the brotherhood succeed in saving her?