Exploring Future Ruins

In 2149, the surface of the earth has been shrouded in "grey fog" for thirty years - the aftermath of an out-of-control nanorobot disaster. The gray fog blocks the sun and erodes organic life. Humanity is forced to retreat to the underground dome city, placing its hope of "returning to the surface and restarting civilization" on a five-person exploration team code-named "Qiguang". Everyone in this team has a unique mission and an unknown obsession. They ride on a modified anti-fog exploration vehicle, break through the sealed cabin of the underground dome, and drive to the future surface forgotten by time.