The history of the First Galactic Empire has lasted for tens of thousands of years, and every planet in the galaxy has been subject to the centralized rule of the Empire.The empire's political system is sometimes authoritarian and sometimes enlightened, but it always manages the galaxy in order.Over time, humans have forgotten that there are other possibilities.Only Hari Seldon was the only exception.  Hari Seldon was the last great scientist of the First Empire, and his greatest achievement was to develop psychohistory to its pinnacle.This knowledge is the essence of social science, which can reduce extremely complex human behaviors into clear and rigorous mathematical equations. 

Although the behavior of individuals cannot be predicted, Seldon discovered that the responses of human groups can be processed statistically, and the larger the number, the more accurate the calculations will be.Seldon's research object was all humans in the galaxy, and in his time, the total population of the galaxy had reached a trillion people.  In the process of studying psychohistory, Seldon discovered an astonishing fact, that is, the superficially powerful empire was actually terminally ill and doomed to collapse.This prophecy was the exact opposite of all common sense and popular belief at the time.Seldon foresees (or rather, he solves the equations he derives and explains the symbolism) that if this situation is allowed to continue, the galaxy will experience thirty thousand years of tragic anarchy, and then another A unified government can emerge. 

Thus, he began his efforts to turn the tide and turn the world around, trying to reduce the aforementioned 30,000 years of anarchy to a thousand years, that is to say, to restore peace and civilization after a thousand years.To this end, he carefully set up two bases of scientists, which he named "the base" and deliberately located at "two opposing ends of the galaxy".Everything about one of the bases is completely public, while the existence of the other second base hardly leaves any form of records. The history of the first three centuries of the First Foundation has been described in detail in these two books.It started as a small community of encyclopedia writers, lost to oblivion in the void of space on the outer rim of the galaxy.Periodic crises hit this base one after another, and each crisis contained various variables in the collective behavior of human beings at that time.Its freedom of action is limited to a specific trajectory, as long as it continues to move forward along this trajectory, there will be a bright future, and then it will be able to open another new game.And all of this was planned by the long-dead Hari Seldon.

Relying on its superior scientific and technological achievements, the First Base first conquered several backward planets around it, and then faced the warlords who broke away from the dying empire and ruled the roost, and defeated them one by one.Then, it clashed head-on with the remnants of the empire, and finally defeated the last strong emperor of the empire and the last real general under his command.  However, the next opponent that the first base encountered was an alien that even Hari Seldon could not foresee.The self-proclaimed "Mule" is a mutant, endowed with unrivaled spiritual powers capable of altering human emotions at will, thereby reshaping the hearts of others.He can transform the toughest of sworn enemies into the most loyal of servants, and no army can - and will - stand against him.The First Base finally could not escape the fate of falling, and the Seldon plan was about to collapse and disappear. 

However, the enigmatic second base still exists, so it has become the target of public criticism.The Mule had to get it out of the way to conquer the galaxy, and the First Foundation had to find it for an entirely different reason.But where exactly is it?But no one knows.  The story narrated in this book is the legend of people from all walks of life looking for the second base!