Heroine: Shen Xingye/Yue Shen, who looks ordinary but is actually the head of the mysterious killer organization "Netherworld Pavilion". He has strong martial arts skills, extraordinary resourcefulness, cold and tough personality, cold outside and hot inside, and has an unknown past.
Male Protagonist: Xiao Yu is the favored prince of the current dynasty. He looks as gentle as jade, but in reality he is deeply sinister. He has political ambitions and means, and is also good at martial arts. It is a force that cannot be underestimated in the DPRK.
