There hasn't been many films about prehistoric people, especially the meeting of the Cro-Magnon man and Neanderthals. This film had so much potential in exploring this, but instead it was executed poorly as a "horror" film without any real horror. As others have said, most of the film is too dark to see, a lot of running and hiding, jump scares.
What really disappointed me is the lack of simple research in the topic for such a film. The depiction of the Neanderthals and the first Cro-Magnon into Europe after the ice age were completely scientifically off. This makes people who actually know enough of the subject unable to suspend their disbelief.
I'll give this a 4 for the creativity and concept. However, if you really want to watch a good film on this topic, I suggest the NOVA special from 20 years ago which covers it in detail and filmed it with high quality aesthetics.
4/10.
