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 "bottomless" crack in the earth. Others who meet the thing in the night suffer likewise, and with increasing severity; it seems to be able to "absorb" radiation from any source, growing bigger and bigger. What is it?? How do you destroy a thing that "feeds" on energy?
一名女子（莉顿·梅斯特饰）周末到克罗地亚度假，没想到这却出了岔子：她被指控杀害了自己最好的朋友（克里斯蒂娜·乌尔夫斯帕尔饰），并在试图弄清真相的过程中了解到一个令人痛苦的秘密。
