Adapted from the novel of the same name by Zhihu author Xu Jiu Wangchuan, it tells the story of Su Qin (played by Huang Yangtiantian), a noble concubine who suffers from a strange disease. After being thrown into the cold palace, she is kidnapped by a man in black named "Sick in the sick", and ends up having an affair with the regent Lu Huan (played by Huang Yangtiantian).Zhang Jingyun (played by Zhang Jingyun) reached a regicide agreement on the condition of staying together and getting married. During the assassination incident, the two of them died together and their relationship gradually warmed up. As the true identity of the man in black was revealed, the two finally fell in love and stayed together.