In this cyber city where everyone can plug in and out and trade memories at any time like a USB flash drive, the former criminal policeman Silent became a wanted criminal in the city because he was implanted with a "memory of a murder" that he had never committed. In order to clear his grievances, he must find the real owner of that memory within 72 hours after the memory was brain-dead due to rejection, but he discovered that this was a purge conspiracy targeting the entire memory black market.
