 Mankind is being destroyed by a conglomerate of alien races all under the flag of the Covenant. A human starship is under attack and has no chance to survive, and now the only hope for Mankind is for the Spartan-II forged Master Chief to make sure the Covenant forces do not get a hold of the ship s AI, and thus find the location of Earth. But the survivors of the Pillar of Autumn are stranded on a bizarre alien planet mankind calls Halo, and everything is stacked against them. It becomes a desperate battle as the brave crew, lead by the Master Chief and the AI Cortana, try to survive the Covenant s assault.