This is a really great science fiction film about time travel, easily earning an above-average rating. It moves quickly and presents some genuinely perplexing ideas, with plenty of action that brings to mind the style of Michael Crichton’s work—definitely worth seeing :-) A collection of young people who enjoy exploring caves and archaeology students plan a short excursion to locate their missing professor within a remote cave system. What they find turns out to be far more exciting than they anticipated, though... Have fun with it!

Source on TMDB