The last survivors of the planet Rambat, a group of alien Brain-Globes decide to move Earth to their own solar system and use it as a new home. They try to defeat Superboy, knowing the teenage hero of Smallville will oppose their plan. When they fail, they summon his friends Cosmic Boy, Lightning Lad, and Saturn Girl, the founders of the 30th century team of teenage champions called the Legion of Super-Heroes. Rambat mentally commands the trio to capture him. After the time-traveling teenagers succeed in capturing Superboy, the Brain-Globes release them from mental control.