A group of young adults crashes their boat on some island, and they encounter a race of primates that is maybe the missing link or maybe something else. It's not really clear, but one thing is certain: they are deadly.
This movie is stupid for a number of reasons, the first being that they have no clue what they're talking about with Catholics -- the film features a King James version of the Bible (not a Catholic one) and says the motive is evolution denial. Believe it or not, the Catholic Church believes in evolution! This is also obviously a "Predator" ripoff based on the cover art, and the creatures' vision. The beasts in the film don't even really look like the cover, so it's a ripoff and misleading.
Where is this? 5 hours north of the Antilles... is that where evolution occurred? I don't know, but I doubt it, as that would be off the American coast.
Lance Henriksen appears, and tries to save the film... but fails.