Destiny: Last Lights
"I was born the moment the Traveler died as everything collapsed around us. Before that day there had never been a Ghost, there had never been a Guardian. I don't know much about the Traveller, but I know it made me to bring you back. And I spent a really, really long time searching for you...As I saw the other Ghosts find their Guardians and the centuries went by I wondered if I would ever find you, and then I did..."
-A Ghost
Centuries ago man came across a celestial being traveling space known as The Traveller. The Traveller uplifted humanity, bringing forth a golden age that brought forth all sorts of technological miracles. Man built travelled to others planets and were not only able to live on these planets, but able to thrive. Jungles were grown on Venus and great cities were built upon Mars and Venus. But this golden age had an expiration, an enemy simply referred to as the Darkness sought to destroy The Traveller.
At first, the Fallen came to edges of our Universe, but they were held back by man along with their creations, the War Minds and Exos. But soon after the Darkness arrived and slaughtered billions of human lives brings humanity's Golden Age to a crashing halt. Much knowledge and technology from the age was forever lost and buried beneath the sands of time during this event. The Traveller intervened and went dormant in an attempt to save humanity that has so far worked. In its dormant state it has sent agents known as Ghosts to seek out those who would wield light to fight The Darkness.
However, other foes arose as well. The Cabal Empire sent massive legions who quickly invaded and occupied Mars. The Fallen arrived in greater numbers and conquered vast amounts of Earth, Venus, and even Earth's moon. The Hive came and occupied the Moon, waiting with their lord, Crota for some unknown reason. And the Vex originally docile and dormant have become hostile and aggressive waging war upon The Fallen and The Cabal on both Mars and Venus.
Humanity has been pushed back to a single city under the shadow of the dormant Traveller. The foes of humanity advancing upon them and gaining ground with each day. The light of The Traveller is fading and it is up to those guardians who remain to turn the tide or at least hope that they can hold it back.