Twin sisters × princes with dual personalities, the dynasty was overthrown due to identity swapping.
The elder sister Xie Qinghuan is a dignified princess, but the younger sister Xie Qingying is a killer in the world. Due to an assassination, the sisters were forced to switch identities. The elder sister replaces the younger sister and becomes the head of the killer organization "Infernal Affairs Pavilion". The younger sister pretends to be a princess and gets involved in the battle for the heir. The two gradually discover the "blood curse" hidden in their twin bloodlines - if they don't fall in love with the same person at the same time, one of them will die. And the seventh prince Xiao Jinghuai they both fell in love with turned out to be a maniacal schemer with a dual personality.
