The destined-to-be-classic tale of the Last Son of Krypton by Geoff Johns, Richard Donner and Adam Kubert continues! The explosive return of Bizarro threatens the future of Krypton's last son as Clark Kent and Lois Lane make one of the most heartbreaking decision of their lives. Plus, what does Lex Luthor have to do with all of this?
Superman brings the Kryptonian child to his Fortress of Solitude in the hopes of finding answers to explain his sudden arrival on Earth. He consults with the disembodied Jor-El, who knows nothing of the boy's true origins. Afterwards, he flies him back to Smallville, and talks with Lois about adoption. Lois is uncomfortable with the idea, and is concerned whether Clark and she could really be ideal parents to a Kryptonian child.
Meanwhile, Lex Luthor secretly monitors broadcasts of the Department of Metahuman Affairs and learns about the Kryptonian's existence. Having somewhat domesticated the backwards being known as Bizarro, he sends him out to retrieve this "Super-Boy".
Later, Superman attends a full press conference on the steps of the Daily Bugle, and publicly announces that he is leaving the child in the care of Clark Kent and Lois Lane. Sarge Steel is present and asks Superman why he created such a media circus around the affair, to which Superman replies, "It'll keep you and your scientists honest, Steel".
Suddenly, Bizarro arrives and pummels Superman through the pavement. They fight briefly underground, and just as abruptly burst upwards to continue their fight in the sky. Bizarro swoops down and snatches up a child, whom he mistakenly believes is the Kryptonian. He quickly realizes his error when the boy's arm snaps in his grasp. Discarding him like a broken toy, Bizarro continues tearing up the city street in the hopes of finding the Kryptonian. Superman catches the child, and brings him safely to the ground before resuming his fight with the mad, backwards creature. During the carnage, Bizarro hurls a school bus which plummets down, landing directly on top of the Kryptonian's head. Fortunately, his invulnerability proves to be just as strong as Superman's and he emerges without a scratch. Superman finally defeats Bizarro with several strong gusts of Arctic Breath.
Later, after everything has settled down, Clark and Lois walk the boy through the park and discuss their future. Lois decides that they should give the child a proper Earth name, and chooses Christopher.
In the Arctic North near the Fortress of Solitude, three meteor pods land on Earth. Emerging from them are former Phantom Zone criminals, General Zod, Ursa and Non. Zod embraces his newfound freedom and tells Ursa that it is now time to locate their son.