Now the Blood Ravens must fight to reclaim their lost planet or fall forever to the corruption of Chaos. Aurelia has inexplicably returned, bringing with it the Chaos Marines, a group of insane, mutated space marines hellbent on destroying the Space Marines and all they stand for. Chaos Rising takes place mere months after the event of Dawn of War II on planet Aurelia, the home world of the Blood Ravens, which was pushed out of orbit by the warp storm a thousand years ago and was thought to be lost forever.