With an Age of Heroes unfolding around him, super-hero critic-in-chief J. Jonah Jameson finds himself the target of a vicious assassination plot courtesy of a pro-superhuman vigilante! Who is the Extremist? Why does he want to kill the mustachioed mayor? And why does he claim to be Spider-Man's greatest ally? Plus: Can Mary Jane save Spider-Man?! When Doc Tramma, Mr. Negative's scientist supreme and femme fatale, targets the life of Mary Jane Watson, she kidnaps her ex-beau, Peter Parker! With the help of the Black Cat, does MJ have what it takes to rescue the Amazing Spider-Man? Collecting material from WEB OF SPIDER-MAN #8-12.