The heroine Shen Qinghuan was originally the legitimate daughter of an aristocratic family, but due to her family's involvement in a rebellion, she was deposed and relegated to the cold palace.
- In the cold palace, she unexpectedly obtained a secret letter left by the former empress, and began to secretly plan her revenge.
- The male protagonist Xiao Yu is the regent of the current dynasty. He is cold and ruthless on the surface, but in fact he has a hidden affection for the female protagonist. The two go from using each other to working together to conspire in the world.
-In the end, the heroine reveals the truth, clears her family's grievances, ascends the throne as the empress, and rules the world with the hero.
