Chapter Four - Written on Blood

Having saved or helped save (or maybe even just watched others save) the Child, the PCs have earned their place in the Crusade. Abandoned by the Wood Elves, the PCs rake up guard duty and have a chance to get to know the members of the inner circle that protect young Karl. While making their way to Altdorf, the PCs are asked to investigate the allegations of a Chaos cult working within the ranks of the Crusade and in doing so find the corruption that riddles the ranks of the mob, going all the way to the top.

Before they have the chance to expose the corruption, the Crusade reaches Altdorf. After the Emperor and the Grand Theogonist rebuff Karl, one of the boy's advisors suggests sneaking him into the city. The PCs are asked to go along, but their presence is not enough to stop the trap. The advisor gets away with the boy, leaving the PCs to fight for their lives.

This betrayal sparks an investigation that takes the characters into the slums ofAltdorf. Following the leads, the PCs eventually expose the vigilante to be a Mutant traitor, find themselves wanted by witch hunters, and make important allies along the way. In the end, they are not fast enough to find the boy and learn that he's to be subjected to an awful ritual that would transform him into a willing slave of Chaos!