Yunjin is a large trading port in the south, a place of Chinese and foreign affairs. Pei Yan is the seventh young master of the Pei family and a forensic consultant who has returned from studying in England. The birthmark on his forehead is regarded as ominous by his father. Shen Yan is an informant in Laochengxiang. Mr. Pinghua, who raised him, was silenced ten years ago. He makes a living by running errands and gathering information. His smile is what keeps him alive. The two of them bumped into each other at the scene of Xiu Niang's finger-cutting case. One went through the files to examine the corpse, and the other squatted in the alley to interrogate the living people. They didn't like each other.
But after checking and checking, I found that no one could move without anyone. Pei Yan could not enter the deep alleys of the old city, and Shen Yan could not touch the patrol room files. Forced to cooperate, from tit-for-tat to tacit understanding, each of them quietly gained an extra person in their hearts. However, the investigation into the old case becomes deeper and deeper, and the person who killed Pei Yan's mother and Master Shen Yan fifteen years ago points to the Pei family.
Six unit cases, six bloody obsessions. Fingers cut off, bones sealed, faces disfigured, corpses carved, buildings burned, and people returned. Each case corresponds to a scar that the two of them dare not touch, and each case pushes them deeper into the past. Pei Yan has a hard mouth but a soft heart. When tempted, he would say "I'm on my way" or "I need an errand boy". Shen Yan approached with a smile, but stepped back when her heart was moved, afraid of climbing too high, afraid of being left behind if she got serious. Test each other, tell each other the truth, and face the separation of life and death.
Then wait until we meet again at the end of the long night. There is no grand confession, only the tacit understanding of "I won't run away" and "I will run errands". Pei Yan recognized the birthmark and also recognized Shen Yan. Shen Yan accepted the shop and accepted Pei Yan. Justice will be late, but those who continue to investigate will not stop. The heart will be frightened, but those who should come back will eventually come back. The long night in Yunjin has dawned.
Purpose: Keep your true heart in troubled times and find the truth in the darkness. Skin and identity cannot define a person. There is always someone waiting for you at the end of the night with a lantern.