Kara Zor-El lives in Argo City, an isolated Kryptonian community safe from the catastrophic destruction of Krypton. When a power source called the Omegahedron is accidentally lost, it travels to Earth, and Kara follows it, adopting the alter ego of Linda Lee. On Earth, she discovers her powers and enrolls in an all-girls school while searching for the Omegahedron. Her quest becomes urgent as she learns that the artifact has fallen into the hands of the ambitious and malevolent witch Selena, who gains extraordinary powers from it and plans to use it for her own gain.

Selena's increasing power draws attention and puts Linda in numerous life-threatening situations. Despite these challenges, Linda makes allies along the way who help her in her mission to retrieve the Omegahedron and save her community. Throughout her journey, Linda must balance her new human identity with her superhuman responsibilities, facing adversities that test her courage and strength. The confrontation with Selena escalates as Linda races against time to restore the Omegahedron before Selena's aspirations lead to catastrophic consequences.