A group of friends on an anthropology expedition to study ancient rock paintings descend into chaos when one of their own, Mel, becomes violently ill and transforms into a primal, bloodthirsty predator. As the group tries to escape, they realize that one of them is also regressing, forcing them to confront a horrifying choice: kill their friends or be killed by them.
Primal
In the Australian outback, a group of friends venture into the wilderness to witness ancient cave paintings, only to discover one of their own afflicted by a mysterious illness that drives them into a frenzy of primal bloodlust.