Battle commences as the Lannisters launch their bid to seize the throne. Robb rounds up his allies as he prepares to confront Tywin's troops, while Tyrion forms an unlikely alliance with a savage tribe.

At King's Landing, Arya and Syrio are forced to fight for their lives, and a sinister new enemy emerges at Castle Black. Meanwhile, Daenerys tries to reconcile her lust for power with the shocking brutality of war.