Marvel NOW! Arnim Zola"s ambitions leave Captain America stranded in the upside-down territory known as Dimension Z. With no country and no allies, what"s left for the Sentinel of Liberty to protect? Just the one thing his foe values most: Zola"s son! Steve has saved the boy"s life, but can he keep him alive against the savage barbarians of Phrox — with the fate of a world hinging on his victory? And when Zola"s terrible experiments on the indigenous creatures give birth to a terrible new foe, the Odd War of Dimension Z begins!