A science fiction thriller about a weird creature from outer space that survives in the rarefied atmosphere of the Swiss Alps and terrorizes scientists in a remote high altitude research station. This hideous monster hides in the fog-shrouded cloud of mist and kills its victims by decapitation. As the mysterious cloud descends on the Swiss village of Trollenberg, United Nations science investigator Alan Brooks, Professor Crevett and a young woman with psychic powers must find a way to stop the monster's murderous rampage before it's too late.