After Cataclysm, many leaders from the Horde and from the Alliance don't like the way how Warchief, Garrosh Hellscream rule. When Garrosh tried to kill Vol'jin, the leader of the Darkspear, other leaders thought that act was the last straw. Luckily Voljin survived. Now Vol'jin with his alliance can start an open rebellion against Garrosh Hellscream to end his rule.
I hope that you enjoy :)
And by the way, I don't own the music.
Music in the film
Wow - Old Durotar
Wow (Burning Crusade) - Sunwell Plateau, - Dark Portal - Magisters' Terrace
Wow (Cataclysm) - Xaxas - The Shattering
Wow - Ebon Hold
Wow - Seasons of War
Wow - Shorel'Aran
Wow (Wrath Of The Lich King) - Login Screen