The sun goes out and the frozen apocalypse comes. While everyone was looking up at the stars and waiting for rescue, Lin Shen, the reborn man, chose to dig downward - taking a dog with him to dig a boring machine straight into the center of the earth. But he soon discovered that there were even more amazing secrets buried deep in the earth: the remains of ancient civilizations, silicon-based life groups, and a "civilization screening plan" that lasted for hundreds of millions of years. In this doomsday exam, humans are not the first candidates, and they will never be the last. And his choice will determine whether the fire can be rekindled in the abyss.
