A piece of inspection file marked "confidential" quietly landed on Chen Dongyu's desk. At that time, he was worried about a project quality case, and he thought it was a routine task assigned by his superiors. However, he did not expect that these few pages of paper were about to set off a storm that swept through the entire city's power center.
The file records the case of a Housing and Urban-Rural Development Bureau employee who fell from a building. The police concluded that it was an accidental slip. However, Chen Dongyu smelled something unusual from the deliberately organized documents, missing key data, and artificially erased call records. As soon as he was about to conduct an in-depth investigation, warnings from his superiors came one after another: his immediate superior hinted vaguely that he should "stop there", his investigative authority was inexplicably restricted, his office computer was hacked late at night, and his investigation notes were almost cleared. All kinds of anomalies made him convinced that there was an ulterior secret behind the falling case.
But this foggy investigation was completely out of control because of Yu Fan's appearance. She was Chen Dongyu's classmate at the police academy and an old friend who parted ways due to misunderstanding. Now she appears as the deceased's secret lover, and she also brings clues that can subvert the case - the deceased had evidence that could bring down the top management of the Construction Bureau. It was because of this evidence that he was killed.
Yu Fan's intervention puts Chen Dongyu in a dilemma. On one side is his professional belief in uncovering the truth, on the other is the intricate black network of power, and on the other hand is his rekindled relationship with Yu Fan. When the investigation pointed to the old leader he once respected and to the huge interest groups colluding with government and businessmen, Chen Dongyu understood that this investigation had long been a just battle with his future and life on the line.
