Su Chichi, a modern street-food entrepreneur, accidentally travels back to ancient times and finds herself reduced to a humble street vendor. Armed with recipes for all kinds of trendy snacks and modern marketing strategies, she dazzles the entire city with delicacies such as jianbing and yin-yang hot pot. She even cures Prince Xiao Jingyuan's years-long eating disorder. Her innovative business model takes the streets by storm, repeatedly outperforming established merchants stuck in their old ways. When sinister forces in the commercial district deliberately cause trouble, Su Chichi joins forces with the prince, whose true identity is shrouded in mystery, to expose their schemes, clean up the chaotic marketplace, and restore order. In the end, she rises to fame from her humble food stall, wins recognition from both the common people and the authorities, and conquers the ancient commercial world.