Humanity has been forced to the brink of extinction. Even as we take our first steps into space, civil strife, the enigmatic legacy of an ancient civilization, and a fanatical covenant of alien races each threaten to destroy us. All eyes turn to the Spartan super-soldiers to save us, and in particular to their symbol and leader, Master Chief John-117.

Once a legendary instrument of death, he has now become an unlikely symbol of hope.If we can emerge from the chaos of war and reclaim the ancient mantle of stewardship over a troubled galaxy, we may find the secret to our ultimate evolution.