In Paris, the world-famous food capital, a little mouse named Remy (voiced by Patton Oswal) is determined to become a great chef. However, "rational" relatives often remind him not to be delusional, because rats are already the most unpopular advocate in the fragrant kitchen! However, when the "cruel" fate brought it to the sewer in Paris, little Remy suddenly found himself under a French restaurant, where the famous chef Augustine Gusteau, whom he had admired for a long time, was the chef. Such an excellent opportunity gave little Remy endless courage, so he decided to stay here, hoping to realize his wish of becoming a famous mouse chef here. But Remy's gray appearance will naturally arouse people's disgust and even chase around. However, the optimistic little Remy's passion for cooking soon turned all the disappointments into a wonderful and exciting rat race, and even turned the whole food industry in Paris upside down. Fortunately, the lucky mouse met a young man who helped in the kitchen-Linguini (literally translated as spaghetti). Although he lacks a talent for cooking, he desperately wants to keep his job. The meeting of these two guys hit it off, and a "food alliance of people and mice" was formed. The little mouse hides in the chef's hat, manipulates Lin Guini's arm and helps him cook delicious meals after delicious meals. Their wishes have finally come true, but their troubles continue. They must avoid neurotic chefs, they must convince Remy's family to understand his pursuit, and of course, Lin Guini's young and beautiful love. In the end, many things happened, and they finally made the best Provence stew in Paris.