In the forgotten town of Black Hollow, an abandoned mine runs deeper than anyone ever dared to chart. Locals whisper about voices echoing from the shafts at night, voices of loved ones long dead. When a team of surveyors is hired to reopen the mine, they uncover something ancient and hungry sealed in the darkness.

As night falls, the line between dreams and reality fractures—each member of the crew is plagued by vivid, violent nightmares that spill into the waking world. The deeper they go, the more they realize: the mine doesn't just hold monsters—it creates them, feeding on fear until nightmares crawl into flesh.

Now, trapped underground with time running out, they must confront their worst terrors made real... or be swallowed by The Nightmare Below.