Superman struggles against a coalition of his most formidable enemies, including General Zod, Lex Luthor, and Mongul the Elder, as his strength wanes under relentless assault. The Superman family, led by Jon Kent and Supergirl, arrives to turn the tide in a desperate battle for Metropolis. Key allies like Lois Lane and Steel clash with foes such as Cyborg Superman and Metallo, escalating the conflict to cosmic scales.