The story follows Sima Cong, who is blackmailed by a wealthy Thai businessman, Master Xiang, to go 10,000 metres below the Caveman Mountain to find out the whereabouts of the Golden Spider City.
| Actor | Role |
|---|---|
 Liu LinchengSima Cong | Sima Cong |
 Chen MengqiSima Hui | Sima Hui |
 Ning XiaohuaLord Xiang | Lord Xiang |
| SSashaLisa | Lisa |
 Mao FanProfessor Chen | Professor Chen |
 Sang PingMuscular Man | Muscular Man |