With the Human-Covenant war over, the universe is in chaos. The enemy that gave humanity much-needed drive and unity has been defeated. Rising from the trauma of this long-fought, devastating conflict, the UNSC must now lay claim to the universe. But new dangers, both alien and human, may threaten any chance for lasting peace. Join a group of old soldiers and new heroes as they begin a mission to penetrate what was once the heart of the Covenant empire in a desperate attempt to stop old foes from rising again.