When an excursion to Latveria magically sends the Fantastic Four to an alien world, they have to work just to survive - and to make their way back to Earth! But that won't be easy on a world so unlike our own and with an alien civilization hundreds of years behind where we are...and it's not made any easier when JOHNNY STORM hooks up with one of the aliens there! And that's BEFORE this world's terrible secret is revealed...and billions of lives depend on what the Fantastic Four decide next! The Fantastic Four go cosmic in this extra-large spectacular!