Imperiex begins his conquest of the 31st century by freeing the Legion's greatest enemies from prison. The team ask Superman in the 21st century for help, who comes to the future only to meet his 41st century clone.
When it appears that Timber Wolf viciously attacked his own father, the Legion try to catch him. while Chameleon Boy and Phantom Girl work to clear his name.
On a mission to the last surviving outpost of Krypton, Superman learns that Brainiac 5's ancestor was the one who took part in the destruction of his homeworld.
While on a mission to rescue the Legion's 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 help 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 kidnap Dream Girl and put her abilities to use themselves.
After eliminating Imperiex, Brainiac 5 takes over his army and plans to take over the universe. With Superman thought to be dead, the other Legionnaires must stop him before it is too late.
