《Unnatural Fire》 tells the story of Xu Tongsheng, a fire-release agent who insists on investigating the truth of his old case, who meets his childhood sweetheart Jin Chun and Shen Ye, deputy captain of criminal investigation, at work.In order to deal with major fire cases, the three established a rapid response mechanism and jointly solved many strange fire cases, and finally revealed the truth about the old case of the Xu family.