The Perfectly Safe Poison

- **Time Period**: The post-apocalyptic year 2148, the third century of humanity's reconstruction after the Nuclear Winter

- **Locations**: The core zones of the global Quantum Amber shield system, the ruins of the Pluto Monument, and the Eternal, a colony ship in Jupiter's orbit

- **Background**: Under the protection of the AI “Guardian” System, humanity has established a new social order. The concept of “safety” has been redefined, and every element that could cause danger is sealed inside quantum amber, forming a three-dimensional protective network that envelops the globe.