The Covenant controls Earth, the all-consuming Flood is unleashed and the fate of the galaxy hangs in the balance. An ancient secret, buried under the sands of Africa for untold millennia may hold the key to our salvation or doom. Spartan-117, the Master Chief, a biologically augmented super-soldier, must uncover that secret and stop the forces that threaten us once and for all. He is the last of his kind, a warrior born for combat, bred for war... and humanity\'s last hope.