Le Grand Chef 2 begins with a heated debate between the Korean President and the Japanese Prime Minister about the origins of kimchi. The Japanese Prime Minister makes the bold claim that kimchi is originally a Japanese dish, which prompts the Korean President to launch a globalization plan for kimchi, including a nationwide Championship to determine the chef who makes the best tasting kimchi. The contest draws a pair of siblings: Jang-eun, who has made a name as a top chef in Japan, and her stepbrother, Sung-chan. Jang-eun's return to Korea comes with another purpose; she wants to close down her mother's traditional Korean restaurant, since she always 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 stepsister that the winner of the Kimchi contest should have the rights to their mother's restaurant.