Spinning out of the epic Man of Steel miniseries, Kara Zor-El learned that her home planet of Krypton wasn't destroyed by natural forces...it was murdered by a bloodthirsty warlord named Rogol Zaar! But when Kara turns up evidence that Zaar wasn't working alone, she's determined to chase the conspiracy wherever it leads--even to the edges of the universe! Armed with nothing but a Kryptonian space cruiser, Rogol Zaar's mysterious axe and her faithful companion Krypto, Supergirl heads off into the cosmos in search of answers. But there are powerful forces who don't want the truth about Krypton to be discovered, and they're throwing every obstacle they can in Kara's path to impede her investigation.