Six Legionnaires are marooned in the past with Superboy, who is trying to regain his memory.
The Legion of Super-Heroes are trapped with Superboy, who believes he's actually Ultra Boy. They have recently learned that the Time Trapper is behind this fiasco and are determined to find answers. The Time Trapper sends the Molecule Master after the Legion but they are able to defeat him. After the battle, with the Legion exhausted and knocked unconscious, army officials come to detain the Legionnaires but Phantom Girl is able to enter her other-dimensional world with Dawnstar and Superboy in tow.