Kara Zor-El, devastated by the destruction of Krypton, is still finding it hard to adjust to her new surroundings and of course: the burden of being her heroic self: Supergirl as she fails to control her powers and causes accidental collateral damage in Metropolis, she also has trouble bonding with many Humans, especially the Dark Knight who claims her a threat. After Kara heard a few heartfelt words from Clark Kent/Kal-El aka Superman, she travels years into the future with her cousin to meet new faces and an ascendant of Brainiac who are enrolled in an Academy of a heroic team called the Legion of Super-Heroes who are the "future's Justice League" according to Superman. He took her here to train at the Legion Academy since her cousin thought it'd be a good idea if she wanted it. But the Legion of Super-Heroes has issues of their own, a group called the Dark Circle are looking for a weapon and it's locked inside the Legion Academy Vault, the three Legionnaires in charge - Timber-Wolf, Chemical King, Tech Master, and Shadow-Lass didn't need a "Brainiac and Supergirl rivalry" problem in the mix.