The series retells the love story between Princess Pyeonggang and On Dal, who are characters in a classic Goguryeo folktale. Princess Pyeonggang (Kim So-hyun) who was born as a princess but raised to be a person who killed a sinner also known as Yeom Ga-jin, an ambitious woman who dreams to re-establish the status of Goguryeo and be the first female Taewang of Goguryeo. However, she uses On Dal’s (Na In-woo) feelings for her to achieve her goals.
- Kim So-hyun as Princess Pyeonggang / Yeom Ga-jin
- Heo Jung-eun as young Princess Pyeonggang
- Jung Yoon-ha as baby Princess Pyeonggang
A peace-loving, pure man who goes against his principles in order to protect Princess Pyeonggang.
- Lee Ji-hoon as General Go Geon
- Park Min-sang as young Go Geon
An elite general who was perfect in any way and longed to make Pyeonggang his.
- Choi Yu-hwa as Hae Mo-yong
A woman who desired to take control of Goguryeo and play with it as she wanted. She is the adoptive daughter of Hae Ji-wol who fell in love with Go Geon.
A 40-second pre-release special video was shown at the 2020 KBS Drama Awards on December 31, 2020. A special video part 2 was released on January 8, 2021.A poster released on January 14 features the silhouette of Pyeonggang on a horse with On Dal’s face faintly hovering in the sky above her. This reflects Pyeonggang’s strong determination to restore and lead Goguryeo as well as On Dal’s love for Pyeonggang and his desire to watch over her. It reads, “On Dal, the general who turned love into history. Princess Pyeonggang, whose life in Goguryeo was everything. The series aired after Royal Secret Agent from February 15, 2021.
Genre: History, Romance
Run time: 65 min
Release Date: 2020
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