2041, Earth. When the Freeport Space Station was dragged into the planet"s atmosphere, its crash triggered the "Great Cataclysm," a catastrophe that ruined Earth"s biosphere. The planet became a toxic wasteland, and the remaining survivors fought each other for scarce supplies; ultimately these battles wiped out humanity entirely. Yet life persisted on a lunar installation. Originally intended as an immigration hub for the Mars expedition, it rapidly evolved into a thriving metropolis that both governs and nurtures its residents. The moon outpost, officially called "The City of Eden," carries the dream of a full lunar settlement.
In 2267, Takeru—a resident of Eden—competes in "Tube Races," contests between gangs and factions that use hovercraft-like craft. After causing a crash in one race, he is condemned to perform volunteer labor beyond the city limits. While serving his sentence, Takeru discovers remnants that could expose the hidden origins of Earth and Eden. These findings could reshape humanity"s understanding of its origins and the true purpose behind Eden"s creation in the near future and beyond.
Sunrise Japan