A group of explorers ventures into the vast desert of New Mexico in search of an ancient lost temple, but what they find is much more incredible and terrifying than they expected. After a series of accidents, they become trapped in an underground world, where they discover a decaying civilization that has lived in darkness for centuries. The inhabitants of this underworld, known as "mole men," are creatures that have adapted their bodies to survive in the dark and possess an astonishing ability to dig.
The explorers soon find themselves caught in a conflict between two factions of the mole men: those who long to return to the surface and those who wish to remain in their underground realm. As tensions rise, the protagonists must find a way to escape before their curiosity costs them their lives. As they explore the culture and peculiarities of the mole men, they face gigantic monsters, deadly traps, and a struggle for survival that will test not only their wits but also their own morals and desires.
This thrilling adventure, filled with unexpected twists and a hint of horror, raises questions about human nature and the quest for power in a place where no light has ever shone. Ultimately, the explorers will have to decide how far they are willing to go to save themselves and their group.