The film is adapted from the novel of the same name written by Yan Zhiyang. It tells the story of Shen Tuo (Liu Lincheng), a descendant of Mohist's official technique, who enters the Promise Prison alone in order to rescue his beloved wife, Jiang Ren (Liu Jingyi).
| Actor | Role |
|---|---|
 Liu LinchengShen Tuo | Shen Tuo |
 Liu JingyiJiang Ren | Jiang Ren |
 Zhang JiahangMa Guan | Ma Guan |
 Du YumingShouxin | Shouxin |
| GGuo YeHu Sanjin | Hu Sanjin |
 Hou TianfangNot listed | Not listed |
 Liu WeizhouYan Cheng | Yan Cheng |
| SShi XuciNot listed | Not listed |
 Diana DaiNot listed | Not listed |