In the near future, a neural interface module called the "evolutionary layer" sweeps across society. The 1.0 Version can be removed at any time, fine-tuning emotions and perceptions like a filter; the 2.0 Version is permanently integrated into the nervous tissue and irreversible - once injected, the way you perceive the world will be forever rewritten. Version 3.0 Also hides the "NPC module" (Neural Preference Calibration Module), which can quietly pull the user's aesthetic preference baseline toward the "ideal parameters" identified by the system within 12 to 16 weeks. In other words, even "who you like and what you are impressed by" can be engineered and calibrated.
The Gestalt Group, which manufactures the evolutionary layer, also controls the urban communication infrastructure "optical network", forming a complete monopoly from hardware to signals. As long as the evolutionary layer is still running, everyone's perceived joys, sorrows, likes and dislikes are separated by a calibrated filter.
Lin Wan was originally just an ordinary observer in this system. In an accidental contact, she glimpsed the real evidence of the evolutionary layer covering, and thus met Chen Yu, an engineer who knew the principles of evolutionary layer technology well.
Concept: suspense