The Hanging Key

My name is Chen Wang, a detective on the verge of bankruptcy. Until that rainy night, I signed a contract to exchange memories for knowledge. From then on, the case of the missing wealthy businessman, the collective amnesia incident, the tampered memory of death... All the unsolved cases have a price tag in my eyes. The memory of first love can change a key clue. The mother's face can be replaced by the name of a real murderer. But gradually I discovered: My wife's "suicide" three years ago was actually related to this contract. A dark market for trading human memories surges beneath the city. At the end of the contract is a city hanging upside down in the abyss - where all human forgetfulness is stored. When my memory only lasts three days, When the first contractor turned into "nothingness" in front of me, I had to make a choice: is to continue trading and become an omniscient being, Or tear up the contract and let the world return to ignorance? All knowledge has a price, and what you pay may be existence itself.