In this' Three Realms City 'that only exists in mirror time and space, there is a' Three Realms Exchange 'that can help people achieve any wish through trading - as long as the trader is willing to pay the corresponding price. Shopkeeper Jin YaoshouIn the exchange, the energy of desire is collected in this way to maintain a balance of desire. One day, a girl named An Ran was designed by Jin Yao to enter the Three Realms Exchange