Kara, heartbroken over Krypton’s destruction, finds it challenging to adapt to her life on Earth. Her cousin, Superman, guides her and proposes that she travel beyond their current time to join the Legion Academy in the 31st century. There, she forms new friendships and encounters a new adversary, Brainiac 5. At the same time, she faces the threat of a secretive organization known as the Dark Circle, which is on a quest to locate a formidable weapon hidden within the Academy’s vault.