Jewel in the Palace Season 1 Episode 20

Court Lady Choi and GeumYoung serve ManHanJunSuk (all kinds of oily delicacies) to the chief ambassador and Oh, GyumHo asks him to punish Court Lady Han and JangGeum. However, the chief ambassador turns down the ManHanJunSuk and requests that Court Lady Han and JangGeum prepare his meal during his stay. After finding out the medicine she’s been given is slowly poisoning her, Court Lady Jung writes a letter to request Chief Court Lady to visit her residence outside the palace. The Queen mother scolds Chief Court Lady and Court Lady Choi for deceiving her.