The story tells the story of Su Jiu'er, a female constable who is "cold afraid" in the Qianguo Kingdom, and Han Zheng, a young leader of the Qi tribe who is "hot inside", who met due to a bizarre murder case involving the relationship between the two ethnic groups. By chance, they formed a "cold-hot partner" to work together to break through the mystery of the conspiracy, find the truth behind the case, and resolve the national crisis.