Twenty years ago, the leader of the Demon Cult, Yuwen Qingyun, led his followers to attack the city on a large scale. The city lord and his wife both died in the city, leaving only a pair of seven-year-old twin children.
On the way to escape, the two sons separated. But both of them have a common goal - revenge.
Twenty years later, the demon sect was in civil strife, and the princess of the demon sect became the target of public criticism.