At the beginning of the Tang Dynasty, a rain prayer ceremony was organized to alleviate drought, but it was used by those with intentions to create a mysterious case of "Thousand-Headed Demon" appearing. The intelligent and extraordinary death row inmate Dugu was appointed by the Holy Emperor to investigate this case, but unexpectedly, it involved even greater conspiracies.
| Actor | Role |
|---|---|
 Simon YamDugu | Dugu |
 Wei XiangNot listed | Not listed |
 Clara LeeNot listed | Not listed |
 Zeng Mengxue花蕾 | 花蕾 |
 Qi ShenghanNot listed | Not listed |
 Su ZhenhuaNot listed | Not listed |
 Chunyu Shanshan高盛爻 | 高盛爻 |
 Philip Keung Ho-ManNot listed | Not listed |