Qiao Jinse is the owner of the unlicensed Mengyi Pawnshop in the west of the city. The rules of the pawnshop are: guests rent various sweet dreams/old dreams at the cost of a piece of their own memory; every time Jinse completes a transaction, he will charge the tenant three unrelated memories to supplement his mental loss. Because he has relied on foreign memories for a long time, he has lost all his past memories. Uncle Cheng, a non-human spirit, is the butler of the pawnshop, assisting in running the pawnshop. Behind the pawnshop is a memory system built by Jieyu, as well as the core secret box #0000 (the core of the first-generation memory system, which can reverse and tamper with everyone's emotional memory) and #1999 (the key dream box in the book); Gu Linyuan is the heir to the top tycoon Gu family. He has spent ten years and accumulated a billion-dollar price, and renews the same dream numbered #1999 all year round.
