"She's the Last Daughter of Krypton and one of Earth's greatest heroes, but for Kara Zor-El, being Supergirl means feeling like she's got no place to call home. So when a deep-space school called the Crucible- an intergalactic academy that trains the universe's most powerful beings- comes calling, Supergirl is happy to go. But just what are Kara and her new friends being trained for? And what does Crucible want with Supergirl's clone cousin, Superboy? Once the truth comes out, Supergirl may not make it to graduation "--Back cover.