Seo Yi-Gang is the best ranger at Jiri Mountain National Park. She knows virtually everything about the area, including where to climb the mountain. Kang Hyun-Jo is a rookie ranger at Jiri Mountain National Park. He graduated from the military academy and was once an army captain. He has a secret that he can't tell anyone about. These two people become partners and they work to save people around Jiri Mountain National Park.

Set in the 18th century, the drama depicts the love story between King Jeongjo and royal concubine Seong Uibin.

Marrying a king guarantees a turbulent life. Shin Chae Kyung is the daughter of a powerful politician during the Joseon Dynasty. She falls in love with Crown Prince Lee Yuk, who lives under the tyranny of his half-brother, King Yeon San Gun. When Lee Yuk rises to the throne and becomes King Jung Jong, Chae Kyung becomes Queen Dan Kyung, who becomes caught in the cross-fires of different political factions as well as the jealousies between the brothers. When Dan Kyung’s own father stages a coup against the king, Queen Dan Kyung is dethroned only after seven days and expelled from the palace. What will happen to the love between the king and queen when they can no longer be together?