The story begins in 2077, when Earth's temperature plunges to minus 80 degrees Celsius and humanity is forced to flee underground. AI robots, including the Four Mythical AIs: Xuanwu, Fenghuang, Tianlong, and Baihu, take on the task of helping humanity survive, gathering resources from the surface.
Ling Yichen is a technology expert at an underground shelter. He manages the AI System and maintains order among the survivors. The female lead, Li Nianyan, is a biologist focused on restoring Earth's ecosystem.
The dark side of the underground world:
The harsh conditions of underground life fuel endless conflict among humans. As resources grow scarce, darker sides of society begin to emerge, including fraud and power struggles. Li Nianyan tries to find hope for the ecosystem and humanity's future amid it all, but the path is fraught with hardship and challenges.
Chuyuan, the male lead's loyal companion:
Ling Yichen owns Chuyuan, a first-generation AI robot. Unlike other AIs, Chuyuan has a unique emotional module and the ability to learn, making him the partner Ling Yichen trusts most. Through interacting with humans, Chuyuan gradually develops greater empathy and independence.
