In 2056 AD, the sun ran out of energy due to unknown reasons, and a helium flash broke out. The earth was implicated and was unable to recover. Humanity tried its best to find a way to break the situation, but to no avail. Lu Yu's tape showed that he was unwilling to face the coming of destruction. When he opened his eyes again, he found that he had returned to his college days. With the technology tree system that came with him, mankind would rise again.
