Crown Prince Sajo Hyeon is an intellectual character who uses his innate artistic sense to work as a fashion designer at a downtown boutique while hiding his identity of crown prince. He has a wound deep down in his heart from his childhood due to his oppressive father Sajo Seung. Sajo Hyeon’s other personality Ak-hee is a charming character who can easily seduce others, but he is cursed to feel extreme pain when he makes physical touch with others.

Yeon Wol lives a life full of twists and turns, going from an assassin to concubine. Yeon Wol is the royal descendant of the fallen Yeon Dynasty and the only daughter of Yeon Poong-hak. Yeon Wol hides her identity and becomes assassin Gye-ra to avenge her family. While trying to assassinate the king, she falls into a trap set by an unknown person and wakes up the next day with no memory of her past.