Synopsis: At the End of the Blue Dawn

Ja-Yoon willingly becomes a blade to exact revenge for her master, Cheong-Un. However, everything changes when the Prince appears before her while she is participating in the Emperor's imperial concubine selection. The Prince, suspicious of Ja-Yoon's identity, stands in her way, while her master Cheong-Un is forced to watch from afar. In this journey of vengeance to bring down the Emperor, a bitter and cruel tale of love and obsession between three people begins!