In the midst of a lunar base, a crew of astronauts faces an unprecedented challenge when a meteor storm barrages their facility, causing significant damage and isolation from Earth. As they scramble to repair the base and ensure their survival, an unknown spore from the meteors is introduced into their environment. The crew, led by a determined but troubled commander, begins to experience the strain of their dire situation, compounded by the mysterious and rapidly evolving threat posed by the alien spore.

As the spore begins to infect members of the crew, paranoia and fear escalate, pushing the astronauts to the brink of their mental and physical limits. The base becomes a claustrophobic battleground for survival, not just against the external elements of space and the meteor storm's aftermath but against an insidious form that threatens to consume them from within. The dwindling crew must race against time to identify and neutralize the threat before it eradicates them all, forcing them to confront not only the alien danger but also the fragility of human life and teamwork under extreme conditions.