>>14055804
It's the 41st millenium. Mankind controls a massive but crumbling empire that spans the stars, united under the God-Emperor of Man, who's withered and decayed physical body is sustained only by the Golden Throne, a giant life-support machine that feeds him the souls of psychic individuals to keep him alive. The Imperium wars constantly with aliens that seek to destroy, exploit, or manipulate it, as well as the scions of Chaos, who have abandoned the Emperor in order to serve the Chaos Gods and their legions of Daemons. War is brutal and constant, peace is a distant dream, and hope is but the faintest spark adrift in a darkness full of things that would gladly snuff it out.
Oh, and the Imperium itself is every bit as monstrous as its foes. It's a grinding, horrendous totalitarian regime ridden with religious fanaticism, paranoia, and intolerance where thousands are killed in great witch hunts just to ensure a handful of sinners are eradicated. Not a cheery place to be. And the worst bit? This is the very best that can be done. If the Imperium was any softer, it would have fallen long ago to Chaos infiltrating its body.