Peter Parker and his college science professor Dr. Curt Conners explore neogenics as a method of limb regeneration. But while experimenting on himself, Connors accidentally becomes the Lizard, a half-man, half-reptile monstrosity that terrorizes Manhattan and subsequently kidnaps his own wife. Spider-Man's task is doubly difficult because he doesn't want to hurt the good friend he knows is trapped inside...but he must stop the inhuman beast who is out of control.

Dr. Curt Connors is set to study the Tablet of Time, a recently discovered ancient artifact that is said to restore a person’s youth. Dr. Connors believes that it can cure Spider-Man’s mutagenic transformations with the tablet.

With the Tablet of Time, Silvermane's youth is restored, but he continues to grow younger until he finally becomes an infant.

Spider-Man seeks Curt Connors aid to help reverse the aging effects of the Vulture's talons. The Vulture meanwhile sporadically turns into the man-spider from the mutagenics he absorbed with Spidey's youth. At the same time, the Scorpion grabs Dr. Farley Stillwell to seek a cure for his own mutation. With Doc Connors in the middle, feeling the onset of his own his reptilian transformation, will everyone be cured in time for Peter to meet up with Mary Jane as she confronts her wayward father???

Peter and Mary Jane get engaged! The happy couple goes to ask Dr. Connors if he'll give away the bride, not knowing that he's been fighting against the return of the Lizard. While they are talking to him, three more humanoid lizards attack and kidnap Dr. Connors. With the Lizard taking over and Spider-Man captured, Margaret Connors, Mary Jane Watson, and Debra Whitman will have to save the day!