In 2552, the Covenant discovered the planet Reach, humanity’s last line of defense. The UNSC mounted an unparalleled assault against the alien war machine, and at the heart of this conflict was Noble Team, an experienced group of accomplished soldiers prepared to meet the enemy head-on. Now, with the addition of the team’s newest member—Noble Six—this squad will face its most challenging mission yet: the defense of Reach…in what may well be the twilight of human existence.