Bizarre murders occurred one after another in Jiangcheng. The scene was clean and flawless, leaving only an old object that had nothing to do with the deceased. Private detective Su Xun was involved in the investigation, but when he touched those old things, he was enveloped by a familiar and biting emotion - it was not murderous intention, but paranoia and longing that had been dormant for sixteen years.
There was a vague smell of cedar soap at the crime scene, the hidden circular dents on the old objects, and the murderer's deliberate protection of the children... All the clues pointed to a name that he didn't dare to think deeply about.
He is a detective living in the light, while the other person is a murderer walking in the darkness. The young people who depended on each other in the abyss that year are now reunited in the world, but they have become the most familiar strangers to each other. He didn't dare to admit it, and he couldn't admit it, but the bond they had endured together from hell had already been engraved in his bones.
Concept: Memory and Bonds