I'll tell you about two events in Changgyeong palace.

First there is Lady Jang. Lady Jang is the royal concubine. But she cursed queen Inhyeon. So the King killed Lady Jang in Changgyeong palace. There is the famous sentence, "I'm the mother of crownprince!"

Second, there is crownprince Sado. There were two powers at that time. They are the strong power, Noron and the weakest power, Soron. But crownprince Sdo didn't like the strongest power And the power also didn't like the strongest power And the power also didn't like crownprince Sado. So the power suggested "Kill crownprince Sado!" to the King. After all, the crownprince Sado was killed. He stuck inside a rice chest. And, finally, he died in 8th days.

Ther is a quote that "Good always triumphes over evil." In Lady Jang event, the quote is correct , but in crownprince Sado, the quote is incorrect.