Nobody takes much notice when a death row inmate vows on the electric chair to come back from the dead and kill five men who have wronged him during his time in prison, until a guard is mysteriously murdered in the former inmate's cell.
Magneto builds a home strictly for mutants on the orbiting base known as Asteroid M. The message goes out worldwide of initial exodus, and he finds just as many eager to join him, as those anxious to destroy him.