Synopsis of Martian series three :Gray Realm Universe In the year 2068, Earth experienced a nuclear explosion catastrophe, leading to the complete destruction of the planet's ecosystem. Only a few regions retained their original ecological state. The nuclear blasts resulted in widespread contamination, causing the collapse of most national governments. Surviving Earth villagers, under the leadership of the super scientist Wang Chao and his team at the Green Mountain Scientific Institute waged a tenacious battle against the intense radiation of their environment. Twenty years later, in 2088, the second generation of Earth's human immigrants to Mars, known as "Martians," had grown into adults. These individuals, born from the serum-modified human genes by the chosen one, Zhai Xuanxuan, were the descendants of the Martian race. At this time, the President of Mars was Xiao Bai, the eldest son of the chosen one, Zhai Xuanxuan. Analyzing the planets in the local arm of the Milky Way left by his parents in outer space, Xiao Bai saw them as the first line of defense against the potential destruction of Earth by extraterrestrial civilizations. Consequently, Xiao Bai designated Mars as the second line of defense for human protection against extraterrestrial attacks. He sent his twin brother, Xiao Hei, and outstanding individuals from the second generation of Martians, Qin Pengfei, along with their respective fiancées, Maya and Mulan, back to Earth to establish the third line of defense against extraterrestrial attacks. Upon their return to Earth, Xiao Hei and his team first faced the challenges of high residual radiation levels in various regions and the management of human survival in environments, especially in lawless fortress cities and dead zones with extreme nuclear pollution where human entry was forbidden. They discovered a magnetic snow zone controlled by extraterrestrial beings teaching people how to manage Earth's environment. A global initiative was launched to manage radiation zones in blocks, establishing micro-ecosystems to improve the overall geographical environment of Earth. Returning to Earth, Xiao Hei, Qin Pengfei, and Maya all hatched superhuman abilities. Xiao Hei and Qin Pengfei also received Civilization 3.0 spaceships from different extraterrestrial civilizations, encountering descendants of rulers from various extraterrestrial civilizations lurking on Earth. Eventually, they uncovered Earth's secret: a multi-dimensional fish tank where descendants of extraterrestrial rulers hatched superhuman abilities. Carbon-based life on Earth was a genetically protected pool of biological genes in the Milky Way. Xiao Hei, Xiao Bai, Qin Pengfei, and other Martians led the battle against both human and evil extraterrestrial civilizations on Mars and Earth, finally restoring harmony and peace to Earth. Xiao Hei also inherited the knowledge scepter and resources from his grandfather, the ruler of the Yulü clan, gaining the technological key to traverse the cosmic boundaries of the Milky Way. This fundamentally solved the fate of the Yulü people, who, after the annihilation of their native star system, had been wandering the cosmic boundaries for thousands of years. Xiao Hei not only destroyed the Yulü's super-dimensional annihilating weapon, the Biphasic Fu, which instilled fear in the civilizations of the Milky Way, but also united the forces of various civilizations in the Milky Way with love, righteousness, and benevolence. In the end, they transformed Mars into a planet-warship, and the humans of various civilizations on Mars became one family, truly becoming Martians in every sense. The Martian warship became the main force of the Milky Way's defense fleet, serving as the guardians of the Milky Way.