After a thermonuclear war, the entire world was shrouded in radiation, and the ground was no longer suitable for human habitation. Human beings had no choice but to move underground and build underground cities.
As the most talented and capable mecha master in human history, Su Wen discovered signs of human activity on the ground while repairing a return mecha.
In order to prove his idea, Su Wen defied all opinions and led an eight-man mecha team to return to the ground to find new hope.
Purpose: To find the ultimate meaning of human beings