For the first two decades of his life, Ren has endured the brutal training of a sith. He possesses enormous talent in the force, but unlike other sith he has never truly been consumed by the dark side. When Ren is cast out by his master, he embarks on a journey to understand who or what he is and he is. Along the way he finds unlikely allies and is pulled into a destiny surrounding one of the most notorious and powerful lords of the original sith race from thousands of years ago.

After the end of the conflict on earth with the covenant. The covenant divided into the second formed Heretics. The Arbiter leads his covenant, meanwhile the Master Chief handles the flood along with the Rookie.