廿四岁的卡拉·佐-艾尔是超人的表姊,同样出身氪星的她从十三岁起被丹弗斯一家收养。她本已习惯隐藏自己的能力,隐身在人类社会不起眼的角落;直至与其身世密切相关的邪恶势力现身地球,危及卡拉的至亲和全城的普通民众……Twenty-four-year-old Kara Zor-El, cousin of Superman, who was taken in by the Danvers family when she was 13 after being sent away from Krypton, must learn to embrace her powers after previously hiding them. The Danvers teach her to be careful with her powers, until she has to reveal them during an unexpected disaster, setting her on her journey of heroism.