An older version of Franklin Richards travels from the future with an ominous warning for his younger sister Valeria: a conflict is approaching, a clash between four ordinary cities. The Fantastic Four launches a series of adventures into four unique and bizarre lands. Deep beneath the Earth's mantle, the remnant of a mad experiment gone awry begins to rise. From an ancient seascape, the last descendants of a lost kingdom make contact with mankind. In the fabled Blue Area of the moon, a king girds his people for war. In the Negative Zone, strange and deadly creatures prepare for conquest. Mister Fantastic, the Invisible Woman, the Human Torch and the Thing are thrust into the center of this conflict, the War of the Four Cities.