Inspector Chen is on the case of a serial murderer when he is called away to report on environmentalists trying to tackle the pollution issues in China.
But before Chen can make a start, he is called away by a high-ranking Party member for a special assignment: to infiltrate a group of environmental activists meeting to discuss the po.
Chief Inspector Chen and Detective Yu Guangming are brought into a serial murder case when the Homicide squad proves incapable of solving it.
Inspector Chen is on the case of a serial murderer when he is called away to report on environmentalists trying to tackle the pollution issues in China