Down a Kyoto backstreet lies the Kamogawa Diner, run by Chef Nagare and his daughter, Koishi. The duo have reinvented themselves as "food detectives," offering a service that goes beyond cooking meals. Through their culinary sleuthing, they revive lost recipes and rekindle forgotten memories. From the Olympic swimmer who misses his father's bento lunchbox to the pop star who remembers the tempura she ate to celebrate her only successful record, each customer leaves the diner forever changed.