This Marvel Masterworks collections presents The X-Men series from the Silver Age of comic books.

When Dr. Reed Richards takes his three friends on a dangerous rocket ship test, the four are transformed by cosmic rays into superheroes: Susan Storm becomes "Invisible Girl," Ben Grimm's anger manifests as "The Thing," Johnny Storm is lit up as the "Human Torch," and Dr. Richards himself changes to the elastic "Mr. Fantastic." Together the four try to cope and save their city from danger many times.