Superman (David Corenswet) embarks on a journey to reconcile his Kryptonian heritage with his human upbringing as Clark Kent.

He faces challenges from Lex Luthor's war profiteering and a government-created clone named "Ultraman," who deteriorates into Bizarro. Superman teams up with other heroes like Hawkgirl and Green Lantern to stop Bizarro while Lois Lane and the Daily Planet staff work to expose Luthor's crimes.