Kal-El journeys to the past to confront his father Jor-El during the creation of the Phantom Zone, risking temporal collapse as they grapple with their divergent philosophies. Meanwhile, Supergirl navigates a fractured identity crisis while Lex Luthor and Ultra-Humanite scheme in the present, with Jimmy Olsen and Lois Lane caught in the crossfire. The issue weaves multiple timelines, blending legacy and legacy threats across Superman's extended family.