AllMovie

When a plane full of tourists crash-lands on an island off the coast of Mexico, the survivors soon discovers that they have an even greater danger awaiting them once they free themselves from the wreckage -- the island is overrun with bloodthirsty mutated baboons, the result of a scientific experiment gone wrong. An eccentric guide (Ron Perlman) who understands the strange apes is brought in to save the stranded travelers before it's too late. Primal Force also stars Roxana Zal and Mark Kiely.