Yeon Ji-Young (Lim Yoon-A) is a French chef with a cheerful and determined personality. One day, she wins a French cooking competition, but she somehow finds herself transported to the Joseon era. She happens to serve her food to King Lee Heon (Lee Chae-Min) of Joseon. He is the worst tyrant who wields absolute power. He does have extraordinary sense of taste. He is able to taste differences of food when even the weather changes. He happens to try Yeon Ji-Young's food and likes what she made. He decides to take her to the royal palace and have her cook for him. Yeon Ji-Young, who was offered work at a Michelin 3-star rated restaurant in Paris, finds herself working for the tyrant King Lee Heon and presents fusion royal cuisine just for him.

Meanwhile, Kang Mok-Ju (Kang Han-Na) is King Lee Heon's concubine. She is greedy and hides her endless ambition for power. Prince Jesan (Choi Gwi-Hwa) is a member of royal family. He is the most powerful political enemy of King Lee Heon.