Jang Hui-bin went from servant to queen to executed. K-drama writers could never.

Real talk, no Korean drama has ever topped the actual story of Jang Hui-bin. She was a court lady who caught King Sukjong's eye, became his favorite concubine, gave birth to the heir, got PROMOTED TO QUEEN (insane for her background), then got demoted back, and finally got the death sentence via poison in 1701. All because of palace faction politics between Namin and Noron. The whiplash this woman experienced in like 15 years is more plot than most shows manage in 50 episodes.