A tale of cruel revenge in the heart of the Imperial Palace.
This is the story of a Court Lady, Longhee, who has spent numerous years between the high walls of the Inner Palace, and of her son, Un, the First Imperial Prince.
It follows their lives as they struggle for survival and guard one another against the treachery that lurks in the darkness of the Imperial Harem.

My death is driven by a non-unit. Oh, Hee-la! The song of the half-wall, who will not return.

Original Webtoon:
Daum, KakaoPage

Official Translations:
Japanese, Indonesian, S.Chinese

•Expired:
S.Chinese (KuaiKan)

Note: The series is combined with its Prequel on Kakaowebtoon Indonesia under the name 'Syair Kesedihan'.