The Twist: The parchment the group has been guarding and following is revealed to be a "white elephant." The fief of Aurocastro was given away by the Emperor because it was indefensible against Saracen pirates. The prize was a trap.
The Climax: When the real owner of the parchment (the German knight with the iron hand) returns, he prepares to execute Brancaleone's band. Their "army" proves useless.
The Resolution: They are saved not by skill, but by the random arrival of the monk Zenone. They are forced to join the Crusades to avoid execution. Brancaleone loses his dream of being a lord but immediately adopts a new dream—being a holy warrior—showing that his identity is fluid and resilient. The cycle of delusion continues.