Imperiex begins his conquest of the 31st century by freeing the Legion's greatest enemies from prison. The team must look to Superman in the 21st century for help, and Superman comes to the future only to meet his 41st century clone, Kell-El.
When it appears that Timber Wolf viciously attacked his own father, the Legon try to bring him in... while Chameleon Boy and Phantom Girl work to clear his name.
When only one applicant makes it through the Legion testing, Superman decides to recruit a new member: the non-powered master of martial arts, Karate Kid.
On a mission to the last surviving outpost of Krypton, Superman learns how Brainiac 5's ancestor was the one who participated in the destruction of his homeworld.
While on a mission to rescue the Legion¹s benefactor, R.J. Brande, the heroes find themselves reminiscing about how the Legion was first created by Brande and its founding members: Cosmic Boy, Lightning Lad, and Saturn Girl.
The Legion battle the Dark Circle with the aid of Dream Girl, who can predict the enemy's every move before they make it. But when the Dark Circle realize how the Legion is defeating them, they abduct Dream Girl and put her abilities to use themselves.
After eliminating Imperiex, Brainiac 5 takes over his army and plans to conquer the universe. With Superman presumed dead, the other Legionnaires must stop him before it is too late.
