Xiang Bai was arrested for teasing the county magistrate. Caiying fell into the conspiracy of Lin Su and the second prince in order to plead for mercy. Because Caiying and Hongyi looked very similar, Lin Su asked her to pretend to be Hongyi, the national master of Caixi. After Xiang Bai was released from prison, he went to Shunjing to rescue his childhood sweetheart Caiying and sneaked into Yunji Society following clues. Hongyi's confidant Zhou Fang was bribed by Lin Su to harm Hongyi, but was mistakenly saved by Xiang Bai as Caiying. Hongyi performed the Caixi magic and lost her memory after waking up. She only thought she was Caiying and followed Xiang Bai and his good friend Gongshu Pan to escape the pursuit. The three came to Heishui Village, Gongshu Pan's hometown. The villagers of Heishui were all remnants of a fallen country. Xiang Bai and others agreed to rescue Emperor Xia, who was held hostage in Shunjing, at their request, but they did not expect that Emperor Xia had already been content with the status quo, and everyone left in disappointment. Hongyi remembered her identity and saw through Lin Su's conspiracy to steal the sky and change the day. Xiang Bai and Hong Yi decided to split up into two groups to rescue Cai Ying and expose Lin Su's conspiracy. Unfortunately, due to the betrayal of Emperor Xia, Lin Su was well prepared. The second prince successfully usurped the throne, and Cai Ying also died at the hands of Lin Su...