It is the 41st millennium. For more than a hundred centuries the Eternal Emperor and Empress have been joined in their holy union. He is the last relic of a lost age when hope and wisdom ruled the galaxy, still clinging to his purpose of forging a better future, and she is the last remnant of an ancient pantheon, a mother watching over dying children brought low by their own hubris. Together, they are the Masters and Guardians of Mankind and Eldar, the keepers of the Last Alliance, the embodiment of the Imperium to which a hundred sapient species swear their fealty.
At the core of the Imperium is Humanity, its teeming multitudes ever resilient, stubbornly carving out a future amongst the hostile stars. The greatest of Man's allies are the Eldar, ancient and wise, their shared bond forged in battle and sealed in blood millennia ago. Since then, others have been judged worthy to join in the light of the Imperium, to stand with Men and Eldar as fellows: the industrious Demiurge, enigmatic Tau, countless strains of Abhumans, and many more.
Yet for all the Imperium's numbers, it is barely enough to stave off the forces that would tear it down. United under savage Beasts, the Orkish hordes throw themselves at the great edifice of the Imperium. The Necrons are awakening to a changed galaxy, and seethe at the primitives who would dare harbor their greatest foes the Eldar. From the galactic east, the Tyranids have made landfall and sweep over countless worlds in their hungering tide. In the shadows lurk the Dark Eldar, reveling in the carnage of a galaxy at war. And from the Immaterium, the Chaos Gods brood and plot their eternal vengeance, served by the twisted Chaos Eldar.
To be a man in such times is to be one amongst untold trillions. It is to live in the last bastion of civilization as the darkness draws near. These are the tales of those times. Forget the stories of peace and harmony, for they are fables of a gentler time, when the world still made sense. Remember the stories of struggle and defiance, full of brotherhood and sacrifice, for those are the ones that really matter. Peace is a distant dream growing ever fainter, and there is only war as Men and Eldar hold the line for the promise that has been whispered through the generations, from father to son, from mother to daughter: that there is good left in the world, and that is worth fighting for.
