In the year 2250, the Neptune Space Station goes on-line and soon after becomes an enigma for several unexplained deaths. Captain Thomas Emerson, charged with the investigation, finds his abilities inadequate as each finding turns up nothing. After calling for his brother, Dr. Tubal Jordan, to help, they discover that they are dealing with an ancient life form that cannot be killed, bringing them head on with their own tragic past. Paranoia stalks the space station when it is discovered that this life form could be one of them and was contaminating those they trust the most. After discovering the creature's true agenda, they are forced to engage in a battle at the threshold between the physical and spiritual realms. Their mandate: stop this terror at any cost and defeat is not an option.