Trevor Anderson, a volcanologist, discovers notes from his missing brother that suggest Jules Verne's classic tale "Journey to the Center of the Earth" might be more than fiction. Together with his nephew, Sean, and their guide, Hannah, Trevor sets out to Iceland to follow his brother's trail. Their adventure begins when they descend into an extinct volcano, finding themselves in a strange and dangerous world that lies beneath the Earth's surface. In this hidden realm, they encounter breathtaking landscapes and bizarre creatures, reveling in wonders that challenge their understanding of nature and science.

Navigating through this underground world, the trio faces numerous obstacles and marvels, including luminous forests, giant mushrooms, and prehistoric animals. Their journey is fraught with peril, as the unstable environment and the presence of menacing creatures threaten their survival at every turn. As they delve deeper into this subterranean universe, the quest becomes not only a search for the truth behind the mythical book but also a fight to find a way back to the surface, testing their courage, resilience, and bond with each other.