The story follows Sui Yuan, a scholar traveling to Beijing to pursue his studies, who accidentally stumbles into the "mandarin duck hot pot" trap set by the carp demon Jiang Xiaoyu and falls in love with her. Centered around the Yangtze River, the story reinterprets hot pot culture and creates a bizarre and colorful world of demons.

The film follows Fan who was born on April Fool and caught into a circulatory day full of bad experiences. However, A mysterious man appears and helps him find out a way.