Strange cases occur frequently in the capital. Shen Qingyuan, the only daughter of the Zhenguo general, breaks into the case with her keen insight and is accidentally bound to Prince Jing Xiao Jingyuan who is ordered to investigate the case. The two work together to solve unsolved cases such as the theft of palace banquets and secrets in deep houses. Relatives help add clues. The poisonous prince gradually protects his shortcomings, and the clever daughter is secretly attracted. Amidst the fireworks and fog of Beijing, they explore the truth together and pursue a two-way love affair.
