"Le Grand Chef 2" begins with the Korean president visiting the Japanese Prime Minister and becoming involved in a heated debate over the origins of kimchi. The Japanese Prime Minister makes the bold claim that kimchi is an original Japanese dish which sets off the Korean president.
Upon the Korean's president return home he sets upon a globalization plan for kimchi, which includes a nationwide "Kimchi Contest". Then, a lady named Jang-eun(Kim Jung-Eun) and her step-brother Sung-Chan (Jin Goo) compete in the Kimchi dish contest, with both siblings using their mother's kimchi recipe.
Jang-eun is a famed chef in Japan who returns to Korea to compete in the contest. Jang-eun also wants to close down "Chunyang-gak" - the traditional Korean restaurant that her mother has been running. Jang-eun has felt that her mother loved the restaurant more than herself and her own daughter. Meanwhile, Sung-Chan wants to keep the restaurant and proposes to his step-sister that the winner of the Kimchi contest should have the rights to their mother's restaurant ...