This story looks back to early times, a time when Professor X and Magneto were still young and allies. It was also a time when the world was threaten by nuclear destruction. In order to save mankind, Charles and Erik combined forces in order to avert such chaos from ever happening. However, the consequences were not totally good, as this also paved way for former friends to becomes mortal enemies. Professor X would eventually lead the X-men against the evil minded Magneto and the Brotherhood.