Gordon, the protagonist, begins his story among friends, sharing the perils he faced after being abandoned by his porters and askaris deep in the African jungle. With limited ammunition and only melee weapons at his disposal, he ventures onward rather than retreating. His journey leads him through various landscapes, from dense jungles to desolate deserts and vibrant savannas, each presenting its own set of challenges and discoveries.

In the savanna, Gordon encounters the Shansai, a tribe of exceptional horsemen who have never seen a white man. Despite initial hostilities, he gains their trust and learns of their constant conflicts with neighboring tribes and mysterious beings from the mountains. These beings are described as fierce and come from the jungle to raid the villages, sparking Gordon’s interest further.

Driven by tales of a savage race and haunted mountains, Gordon leaves the Shansai village to explore deeper. He navigates through a perilous jungle where he faces and overcomes a gorilla in a dramatic confrontation. Further into his journey, he encounters the Balingas, a less civilized tribe, with whom he clashes but escapes by utilizing his quick wit and survival skills.

The narrative escalates as Gordon discovers signs of ancient, possibly prehistoric life deep within the forest, suggesting a land forgotten by time where dinosaurs still roam. His explorations lead him to a haunted city among the mountains, filled with relics of a lost civilization. Here, Gordon encounters a captive white woman, hinting at deeper mysteries and darker secrets awaiting him in this ancient land.