In the near future, Lunar Industries has made a fortune after an oil crisis by building Sarang Station, a facility on the far side of the Moon to mine the alternative fuel helium-3 from lunar soil, rich in the material. The facility is Post-scarcity economy, requiring only a single human to maintain operations, oversee the harvesters, and launch canisters bound for Earth containing the extracted helium-3. Sam Bell nears the end of his three-year work contract at Sarang Station. Chronic communication problems have disabled his live feed from Earth and limit him to occasional recorded messages from his wife Tess, who was pregnant with their daughter Eve when he left. His only companion is an artificial intelligence named GERTY, who assists with the base's automation and provides comfort for him.