<p>　　British Army radiation drills at a remote Scottish base attract a subterranean, radioactive entity of unknown nature that vanishes, leaving two severely radiation-burned soldiers... and a &quot;bottomless&quot; crack in the earth. Others who meet the thing in the night suffer likewise, and with increasing severity; it seems to be able to &quot;absorb&quot; radiation from any source, growing bigger and bigger. What is it?? How do you destroy a thing that &quot;feeds&quot; on energy?</p>