The Sixth Sun posse is back. After dealing with Gen. Santa Anna and the zombies down in Mexico, the group is now seeking Baron LaCroix to be rewarded. The Baron wants to meet in the City of Lost Angels where he is buying up large tracts of land for his railroad. Joshua Lumme owns most of that land and wont sell unless his daughter, who joined the mysterious 'Church of New Beginnings', is returned. The Baron offers to double the posse's reward.
The Sixth Sun Part III: Aztec myth says the gods created four worlds or "suns" that were each destroyed. Now is the time for the Sixth sun to rise. After fighting mystical Aztec warriors in San Antonio and fending off large spider hordes in the Apache lands, known as "the Suffering", the posse has finally reached Monterrey, Mexico where they must now survive negotiations with Gen. Santa Anna.