Maciste arranges for himself and his new friend Bangor to be captured by a mysterious band of white-clad marauders and taken to an underground city. There the two are forced to turn an enormous wheel along with other captives as part of a gold-and-diamonds mining operation. The underground city's queen, Halis Mosab, takes note of the handsome, muscular Maciste and chooses him to be her consort if he can meet such challenges as saving the kidnapped Princess Saliura from a gigantic ape. Maciste kills the ape and carries Saliura back to the aboveground world. The white-clad marauders can't follow them if it means being caught in the sunlight which instantly dissolves them. Maciste then returns to the underground city to save the other captives. Meanwhile, high priest Kahab informs his son, Katar, that their queen is not one of them but, unbeknownst to her, was kidnapped as a small child from the "world above." If Katar can marry her...
Mark Forest
as Maciste, the Son of Hercules
Moira Orfei
as Queen Halis Mosab
Paul Wynter
as Bango
Raffaella Carrà
as Princess Salirah
Gianni Garko
as Kathar - Kahab's Son
Enrico Glori
as Kahab - the High Priest
Roberto Miali
as Loth
Nando Tamberlani
as Khur - King of Aran
Carla Foscari
as Henared
Rosalia Gavo
as
Graziella Granata
as Queen's Handmaid
Janine Hendy
as Queen's Handmaid Playing the Harp (as Jannin Hendy)
