Interlaced Scenes S01 E05 Episode 5

It tells the story of detectives Jiang Guangming and Shi Luo who accidentally discover that the crime scene depicted in a novel by writer Gu Jiming coincides with the case they are investigating… Fiction and reality intertwine, as the novel both guides them and plunges them deeper into the mystery… In this convoluted enigma, who is the murderer behind the scenes?