Earth is in ruins, and the war of Heaven and Hell has spilled over into the mortal world. In the frozen wasteland of the apocalypse, Azael and his band of cohorts search for Pen and Michael with orders to kill. Little does he know that his sister has incited a rebel army of her own.

Angels and demons alike stand side by side, ready and willing to fight for a future they didn't realize they could have. Change doesn't come easy, though. Pen is wary of joining New Genesis's revolution, but when Azael shows his hand and Pen learns all that he holds over them, she chooses to fight back, no matter the risk. She only has to survive, one hour at a time.