Warhammer Online 'Race conflict' game background

Hey guys! Well I am complete newbie here so I am just collecting information about Warhammer online edition because I am thinking to maybe give it a try. I am a bit ashamed to confess I know absolutely nothing about it, so could you fill me with some facts, what the story is about and I heard there is some race conflict involved?

Well I must say that I havent been paying attention on complete background of the story, I am just a gamer that is not being much into history of any game, heh. In general the story starts after a big Chaos Plague appeared in The Empire so the common battle good against the evil begins - forces of Empire against the forces of Chaos. When the war started they all picked their opponents Humans against Chaos Humans, High elves vs. Dark Elves and Dwarves vs. Orcs and Goblins, I am now here waiting for the others to fill and pack my story with more facts so we can make this story longer. This is actually not my thing must admit, I am used to asking people to cut it short, LOL.