Chapter 1

Just after the events of Halo 5 Master Chief joins the Arbiter and Blue team after hearing a mysterious message about a forerunner artifact that can stop the Guardians. After accidentally activating the device Master Chief and company end up in an alternate universe where a newly minted evil empire is spreading it's reach on the outer rim of the galaxy. Master Chief must stop the empires expansion at all costs. This also takes place 2 years after Revenge of the Sith.