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