Wen Zou, the cook in charge of the restaurant, accidentally discovered that the aftertaste of each dish contained fragments of the past. She met Pei Zhe, a meticulous special incident investigator. The two went from distrust to tacit understanding. They relied on their respective expertise to work together to solve several unsolved cases that were ignored by the conventional process. They were evenly matched throughout the process, supporting each other through all the hidden dangers.