Mouse falls in love with cat

During the Northern Song Dynasty, the peaceful and prosperous Kaifeng Mansion gradually fell into disrepair. Zhan Zhao (Andy Lau), who followed Bao Zheng (Anthony Wong), had nothing to do all day long and missed his chivalrous life of traveling around the world. He fantasized about one day wearing black clothes again. During one of his incarnations as someone else, Zhan Zhao met the Chinchilla Bai Yutang (Cecilia Cheung) and was deeply attracted by his words and deeds. The Five Rats made a big fuss in the Kaifeng Mansion and took away the engagement token between Zhan Zhao and the sister of the King of Xiangyang (Li Bingbing). Zhan Zhao followed the emperor's order to the Five Rats' lair on Xingkong Island to persuade him to surrender. This attracted Bai Yutang, who was originally a girl and had just begun to fall in love. However, because Zhan Zhao had a marriage contract given by the emperor, the two could not be happy, but their fate did not end there.