In the "Phantom City" where neon lights and rain intertwine, memories can be extracted, traded, and even forgotten. Ling Chen is a top "memory stalker" who makes a living by salvaging broken memories, but he can't find his past. A mysterious commission led him to a woman named Su Wan, who asked to retrieve a dust-laden "last promise". When Ling Chen dived into the chaotic sea of data, he was horrified to discover that the fragments of memory were inextricably linked to the cold pendant on his chest and his blank past. The truth he seeks may be the abyss he desperately wants to escape from.