The fourth episode An Shigeng was trapped by love for one night.

An Shigeng is obsessed with the butterfly dance of his late lover. Butterfly Dance once hoped to marry An Shigeng as a concubine. The emperor appreciated the butterfly dance very much and invited it to dance in the palace. An Shigeng was very upset and worried that the emperor would take a fancy to the butterfly dance. Butterfly Dance believes that the emperor is the head of a country and will not do anything that goes against heaven. Father-in-law Zhang came to Anfu and waited for the butterfly dance to enter the palace. An Shigeng was upset and sent Butterfly Dance away. Soon, Zhang Gonggong came to Anfu with two servants to report his funeral to An Shigeng. The emperor wanted Butterfly Dance to be his concubine, but Butterfly Dance never committed suicide by throwing herself into the well. Zhang Gonggong asked a servant to return the cloth shoes left by Butterfly Dance to An Shigeng. An Shigeng borrowed cloth shoes and called the name of Butterfly Dance sadly. An Shigeng was depressed all night because of the butterfly dance. Shortly after the death of Butterfly Dance, An Shigeng found a woman who looks like Butterfly Dance, Ru Yan. An Shigeng asked Ru Yan to recite some poems, but Ru Yan was too stupid to remember the lyrics. An Shigeng was angry and disappointed with Ru Yan every time. .

An Shigeng's acting skills are slightly exaggerated. .