When a ruthless enemy strikes close to home, Kara Zor-El (Supergirl) is forced out of isolation and into an unlikely partnership with a young companion on a dangerous journey across the galaxy. As they pursue justice against a powerful foe, Kara confronts the pain of her Kryptonian past, questions the line between revenge and heroism, and ultimately discovers what kind of hero she wants to become. Inspired by the acclaimed comic Supergirl: Woman of Tomorrow, the film blends epic space adventure, emotional character growth, and high-stakes action.