With Krypton destabilized from mining of the planet's core, Jor-El, chief advisor to Krypton's supreme council, recommends the council give him control of the genetics codex. Before any action can be taken, soldiers led by General Zod, an old friend of El's, launch an uprising and arrest the councilors. Realising that Krypton is doomed, El steals the genetic codex sought by Zod and infuses them into the DNA of his infant son, Kal-El—the first naturally born Kryptonian child in centuries. Donning his old armor, El sacrifices his life to allow his son to escape on a preprogrammed spacecraft. The council quashes Zod's rebellion, and its members are sentenced to exile in the Phantom Zone after being convicted of treason. Krypton explodes soon after.
Fearing that the actions of Superman are left unchecked, Batman takes on the Man of Steel, while the world wrestles with what kind of a hero it really needs.
Fueled by his restored faith in humanity and inspired by Superman's selfless act, Bruce Wayne enlists the help of his new-found ally, Diana Prince, to face an even greater enemy.