Vlci bouda

A group of young students is on ski training in mountains. There are only one passage to chalet: telpher. They soon discover one of them is additional. And food is less and less. Adult trainers seem to be rather strange, too -- they love snow and cold, they want someone of young people would try to kill another one and maybe they are from outer space. Young people must discover truth, to help themselves and escape. Excellent psychology horror. (imdb comments)