The story outline is that its 300 years in the future and The Terran Dominion is what evolved from Arcturas Mengskt's empire, who now is the main force in the galaxy, unchallenged and seemingly alone. The Terran Dominion currently is in complete control of the Zerg Swarms although Kerrigan was never killed. The Protoss race was nearly destroyed, and the remainder are mostly fleeing for their lives, but some are fighting back and using warp gates to bring in troops and supplies to battlefields. The Cantstandian Empire has been hiding in the darkness of space waiting and watching, spying on all the battles between the protoss, terran, and zerg forces of the last 300 years, and now that they have gathered enough technologies, stratedgies, and resources for war, they plan to attack and set free the citizens of the Terran Dominion. The Zerg are currently under control mainly by the Terran Dominion, althought the Cantstandians do have a few broods under their control. With the Zerg under human control, they have been genetically engineered to be super killing machines, and if Kerrigan is alive, and regains control, well, just dont let that happen.