Two ships left Krypton before the planet was destroyed, in one of them is Kara with the mission of taking care of her cousin Kal-El who was just a baby but several meteorites followed them on their way making Kara's ship from diverting being stranded in space leaving it in a state of hibernation until the ship ended up on a planetoid known as WarWorld where the owner of this mobile weapon is: Mongul II who, noticing that it was Kryptonian, has an idea of how to recover the key with which to activate the power of WarWorld once again.
On Earth, Superman shows Lois Lane the Fortress of Solitude that he discovered a few months ago and with which he learned much more about Krypton than he already knew, but they were not alone since a Lex Luthor robot secretly infiltrated it place stealing a couple of Kryptonian crystals and leaves the place before Clark is alerted to the intruder but fails to stop him, with these objects Luthor plans to create a machine capable of trapping Superman in memories of his planet that are stored in the crystals...
