When a farmer unearths a mysterious golden dome beneath his Australian property, he inadvertently triggers a series of lethal traps that threaten to unleash a forgotten power upon the modern world. Driven by an obsessive need to uncover the secrets buried in the ancient clay, Alan Dundas navigates a subterranean labyrinth that defies contemporary understanding. His single-minded pursuit forces him to confront technological marvels that have remained dormant for millennia, effectively bridging the gap between a primitive colonial landscape and a sophisticated, alien past. The narrative unfolds through a classic adventure framework, emphasizing the tension between human curiosity and the catastrophic potential of long-buried knowledge.

As a foundational work of Australian science fiction, this novel is often analyzed for its early exploration of the 'lost race' trope combined with speculative technology. The text suggests a preoccupation with the fragility of modern civilization when faced with the remnants of a superior, extinct culture. Readers and critics frequently highlight the contrast between the mundane setting of a rural watering hole and the high-stakes discovery of the golden dome. The work serves as a significant example of how early 20th-century writers utilized the isolation of the Australian landscape to frame narratives about global existential threats.