In June of the thirteenth year of Zhenguan, Shen Yu was the owner of the unique "Chang'an Hotel". The novel furnishings, dishes and ice-making techniques in the hotel were amazing. A sudden poisoning case occurs in a hotel, and businessman Qian Mao dies. His followers frame the hotel, and Shen Yu investigates quietly. Using clues such as the fishy smell of the deceased's fingers, he reveals the truth about Qian Mao's self-poison and the person behind Qingya Zhai. It was discovered that Zhao Kui of Qingya Zhai might be involved in arms smuggling. Someone sneaked into the hotel late at night and attempted an assassination but was repelled. Shen Yu counterattacked, promoting a VIP membership system to stabilize the customer base, and spreading the news that Qingya Zhai used unclean materials, which in turn made the hotel business more prosperous.
