In the near future, an advanced nanotechnology called the Source Network, designed to solve the energy crisis, spirals out of control. The nanorobots known as Dust Gnats break free of their programming constraints and begin devouring carbon-based materials with specific structures, transforming them into useless gray dust. This disaster, known as the Dust Silence, destroys the world's industrial infrastructure in a very short time, causing civilization to collapse.
The story centers on the Lingyun Shelter. The protagonist, Chen Xing, was once a young nanomaterials scientist and a peripheral participant in the Source Network project. Carrying guilt over the past and hope for the future, he joins forces with his companions: Fang Rui, the shelter's guard captain and a veteran; Lin Wan, an engineer skilled in traditional crafts; and Su Qing, a perceptive historian. Together, they lead the shelter's residents as they clash and cooperate with other survivor groups, each with its own philosophy of survival. Gradually, they uncover the deeper causes behind the Dust Silence and ultimately discover that the true way forward lies not only in repairing technology, but also in deeply reflecting on and transforming humanity's path of development.
