On the 12th episode of “The Tyrant’s Chef,” which aired on September 28, Jesan Prince (played by Choi Kwi-hwa) is depicted falling to the sword of his nephew Lee Heon (played by Lee Chae-min). When Lee Heon returns to the palace, Jesan Prince reveals his hidden ambition, saying, “I reversed everything with the coup. You were never meant to be king. I should have ascended the throne from the start.”
In response, Lee Heon confronts him, saying, “Is that what it was? Uncle, you wanted to become king.” Ultimately, he takes up a sword for Grand Prince Jinmyeong. After being attacked by Jesan Prince on his way to exile, Lee Heon successfully counterattacks, and in a final one-on-one duel, Jesan Prince falls, unable to let go of his obsession with the belief that “I should have been the king of this Joseon.”