Shen Qinghe guards the begonia cake shop left by her grandfather. With demolition looming, business is desolate. Song Yao, Gu Mingyuan, Lu Chenfeng, and Zhao Yiming join one after another, learning to boil sugar, flip molds, and carve molds, using videos, records, and design to make the old craftsmanship seen. They apply for intangible cultural heritage status and hold open days, ultimately saving the shop and making the begonia cakes bloom with new flowers. At four o'clock every day, the syrup is still boiling.