After a lengthy absence in space, searching for remnants of his home planet Krypton, Superman returns to Earth. He discovers that the world has changed in his absence; people have learned to cope without him, and Lois Lane, the love of his life, has moved on, now a mother and engaged to Richard White, an editor at the Daily Planet. As Superman, also known as Clark Kent, tries to rekindle his relationship with Lois and find his place in a world that has become skeptical of heroes, he must also come to terms with the fact that the people he cared for have changed and grown in his absence.

Meanwhile, Superman's arch-nemesis, Lex Luthor, has been released from prison due to Superman's failure to appear at his parole hearing. Lex embarks on a sinister plan to gain immense power and destroy the Man of Steel in the process. Using advanced technology and stolen crystals from the Fortress of Solitude, Lex's scheme not only threatens Superman but the entire world. As Superman struggles to reconnect with Lois and reaffirm his commitment to protecting humankind, he must confront the danger posed by Lex's deadly machinations and prevent a global catastrophe.