The film begins with the scientists of Krypton finding a large mass in the center of the planet. They remove it, which is a large, monstrous creature that they name Doomsday. Doomsday is able to destroy most of the planet, before he is captured and shot into space. Months later, Jor-El concludes that the planet will die from an unknown occurrence. When Krypton is being destroyed, Jor-El goes to the computer Brainiac and asks to prepare the escape pod for his newborn son, Kal-El. Brainiac asks about the other children of Krypton. Jor-El says that he wishes he could help them, but he needs to help his son. Kal-El is sent to Earth as Krypton collapses. Kal-El grows up as Clark Kent on Earth and becomes an editor at the Daily Planet. After all of these years, remains of Brainiac are found on a distance planet. Brainiac is reborn and he makes his way to find the blood of the last Kryptonian. Brainiac lands on Earth and takes on the body of local mobster named Milton Fine. Fine takes a job at the Daily Planet where he attacks Clark, revealing him as Superman to the world. Clark and Milton fight, where Clark is able to destroy the connection between Brainiac and Fine and kill him. Brainiac then goes in himself and fights Clark, but is overpowered by Clark. Clark, thinking he has won, takes Brainiac into space and throws him of into the distance. Brainiac flows aimlessly around space, where he is able to locate Doomsday (who escaped his prison), reeking havoc on Oa. The Green Lanterns fight him off before Brainiac is able to capture Doomsday with a shrinking ray he found on Oa. Brainiac returns to Earth, where he sees that Clark is having difficulty adjusting to life with the world knowing his secret. Superman goes to the Fortress of Solitude, where he finds Brainiac waiting for him. Brainiac unleashes Doomsday on Superman and they have a brutal fight, in which Brainiac constantly changes the hologram of where they are fighting (to confuse Superman about his surroundings and to give Doomsday more objects to hurt Superman with). Doomsday seemingly kills Superman. Brainiac leaves his body to rot in the Fortress while he and Doomsday slowly destroy Earth, in order to build a new Krypton, using Clark’s blood to create the new Kryptonians. Superman’s remains are taken by a robot servant in the Fortress, who was deprogrammed temporarily during the fight. The robot begins to nurse him back to health. All while this happens, Brainiac and Doomsday are destroying the planet, having destroyed Metropolis. Lex Luthor finds out that Brainiac has the blood of Superman, and intends to steal it. After months, Superman returns with long hair. In order to fully fight Brainiac and Doomsday together, Superman creates a black suit that will gather all of the force of the Sun into him. Superman confronts the duo and a large fight breaks out. Out of anger for everything that has happened, Superman kills Brainiac and Doomsday. Having lost much blood during the fight, Superman faints. When he comes to, he flies to Metropolis and sees all the destruction that has happened. He sees a newspaper on the ground that says politician Morgan Edge will help bring Metropolis back to its glory. Superman drops the paper and continues to look for any sign of life in the ruined city (mainly Lois Lane). The screen cuts to black as he begins to worry and shout out her name.