June 8th, 2528; the ravaging war has already taken the lives of millions. The Covenant, a mighty cultural hegemony of races, is on the search for salvation and will stop at nothing to get there. On a routine patrol, however, a vessel's Luminary discovered a Forerunner artifiact on the small arid planet known as ATV-8809, or Blue Wall as it was known to the lesser Humans, the inhabitants of the planet. The planet itself has a modest garrison and is not willing to let the Covenant have the planet for any reason.