A hard-science-fiction novel, with no System. Three hundred years in the future, human civilization has entered a golden age of interstellar exploration. Earth's resources are depleted, and colonies have been established on multiple planets. At the same time, signs of extraterrestrial civilizations are gradually emerging. Interstellar travel technology is highly advanced, and artificial intelligence has become an essential part of human life. But as civilization expands, humanity faces a threat from an unknown force: a mysterious energy entity called “Embers,” capable of destroying entire star systems. It is spreading across the edge of the universe, gradually devouring everything.