Su Nianjin, who is proficient in medical skills, accidentally came to the Yan Dynasty in another world during a mission. The former prince Xiao Muyuan became anonymous and fell into the streets when the country was destroyed. He and Su Nianjin, who had become a child, lived by stealing. At the age of seventeen, Su Nianjin was selected as a spy by Xiao Muyuan without knowing it, and was arranged to go to Prince Yirui's palace to steal intelligence. In the palace, she accidentally met Xia Zhiyi, a woman who also came to the Yan Dynasty. Su Nianjin is delicate and cautious, and only wants to avenge his childhood sweetheart. Xia Zhiyi, on the other hand, has avant-garde concepts and an open mind, and likes to make friends with different men. There are intrigues in the palace and turmoil in the court... The mystery gradually unravels and the truth gradually becomes clear. Su Nianjin discovers that everything is a scam and it turns out that she has been used all along. He cherishes her, loves her, and protects her; but she lies to him, hurts him, and harms him... After all the tricks have been exhausted, will the end result be a happy relationship or a deep resentment?
