During the filming of the TV station, the troupe's ugly young lady suddenly vomited blood, and it was discovered that the artistic director Long Yaozhong was assassinated. The death was deliberately simulated in the traditional Cantonese opera ritual of "sacrifice to the white tiger". Senior chemist Gao An, senior forensic doctor Wen Jiaxi and senior inspector Guo Huihuang led the forensic, forensic and crime team teams to investigate.