In the not-too-distant future, humans have established a closed city-state—Chaoyin City—where there are no natural disasters and citizens live in hierarchical coexistence.
The citizens here only need one belief, and that is the city itself. Supporting the operation of the city is the huge network system "Eden". Eden thinks about decisions on behalf of citizens, uses a credit index to measure citizens' loyalty to the city, and supervises citizens' daily words and deeds. Those who question the city will be "thought corrected" by picket agencies.
Chu Yan, who had been demoted as a citizen in the past for sympathizing with the rebels, is now working hard as an ordinary security policeman and is preparing to meet the blind date assigned by Eden that night. However, an official from the picket agency came to the Public Security Bureau and asked Chu Yan to investigate a murder that occurred in a certain mansion with an ulterior motive. The biggest suspect was Chu Yan's former girlfriend.
In the end, is the fate of this pair of lovers black or white?
Purpose: Freedom is a belief