Sunsets Secrets RegretsEpisode 20

Synopsis: On the banks of the Tong River in Haizhou City, new clues to the "8/17 Case" from five years ago surface. Zhou Jin, an investigator from the Nancheng Public Security Sub-Bureau, whose elder brother Zhou Chuan is one of the two SWAT police officers who died in the case, volunteers to participate in the investigation. With the help of Professor Jiang Hansheng, an expert in criminal psychology, the police identifies a criminal group led by the mysterious Old Scorpion. Meanwhile, Jiang Cheng, an undercover police officer who has been carrying out the Hidden Edge Operation for five years, has infiltrated the core of the enemy and is only one step away from Old Scorpion. The three young men Zhou Jin, Jiang Hansheng, and Jiang Cheng, who grew up together in Zhizi Alley, do their best in their respective positions, outwitting the lawbreakers and defeating evil with justice, courage, and wisdom.