Shun Nonomura is a young man out of Monopolis, a sprawling miner's colony on the lunar surface. His people mine essentials for Earth. In the late 21st century, Earth's resources are depleted and the planetary government has resorted to authoritarian rule to get what they want. As the put-upon miners start to organize a revolt, they come under attack from Earth's new lunar commander, Alex Rigel. As Shun's idealism and Alex's chilly pragmatism clash, Monopolis is thrown into chaos. The last, best hope for victory lies within a mysterious alien artifact the lunarians worship as a god: Dallos!

Summer 1995. With the arrival of the "Age of Cats", the former Kerberos police unit is now disbanded. However one member remains, a stray dog who returns to his old roost after a three-years exile. This wild dog no longer has a master, but now the "Young Lady of Fate" will guide him on his journey.