Aaron visits a nearby college, despite Camael's previous attempts to keep him close.
At the college, he discovers an obsessive professor who has captured a Nephilim, who turns out to be Vilma Rodriguez, Aaron's old high school crush.
He is befriended by Ezekiel, an eccentric but kind-hearted fallen angel, and the former leader of the Powers, archangel Camael.
In Hell, Aaron and Lucifer face off against each other.
Aaron defeats Lucifer, then escapes in time to redeem a severely weakened Camael, returning him to Heaven.
Vilma, however, manages to escape from Hell, leading Aaron to the conclusion the only one trapped in Hell is Lucifer.
Outside the temple, Mazarin and the others face off against Azazel, and defeat him, knocking him unconscious.
Aaron rescues Vilma, but in the process, alerts the Powers to his whereabouts, having lost control and created a flare of fire that pinpointed his position.
Camael arrives to defend Aaron and Vilma from Mazarin, the leader of the Powers, and his forces, but is captured.
Aaron and Vilma, however, are saved by Azazel, who had also responded to the signal.
Azazel leads them underground, deceiving them by telling them Camael is dead when in fact he isn't.
Meanwhile, Mazarin is visited by Michael the Archangel, who tells him that if he wishes to defeat the new threat of Azazel, he may have to join with the Redeemer.