"Supergirl has finally found some peace, living in Harley Quinn's Circus in Leningrad alongside her fellow Bombshells and her clones, Power Girl and Superman. But the war is about to arrive right at her door. Killer Frost is marching an army of Nazis and mythical monsters to Leningrad to claim another of the Circus' residents--Raven, daughter of a demon and the key to unlocking a mystical power that will turn the tide of the war forever. As Zatanna...