Su Jiu'er, a female constable in the Qian Kingdom, has an abnormally low body temperate and often chills. Accidentally, she met with Han Zheng, the young master of the Qi Tribe, and found that his inner heat could relieve her chilliness. They met because of a bizarre murder concerning the relationship between their tribes and made a team with "complementary temperatures" by chance. In a series of following cases, Han Zheng and Su Jiu'er worked together to uncover the scheme and crack the puzzles in order to find the truth. In this process, they gradually had feelings for each other. Also, they not only solved a case but also defused a tribal crisis.