A very clever movie, using the old style movie plot, that the writer and director team very subtly, and very craftily, made their point.
The movie is an old style Science Fiction adventure. Cortez leads six men on an expedition into the Aztec world. Cortez is a good choice, because he is known as one of the less ruthless, but still successful conquistadors. He certainly had more civility than Pizarro.
Along the way, they meet a tribe, and two T Rexes. They are out for conquest, so they decide they will conquer the tribe instead of the T Rexes.
But the tribe gets the better of them, and a priest intervenes on their behalf. It isn't unusual for a Spaniard to be stranded or shipwrecked near a coastal community, and such was the case for this priest, who was deemed interesting enough by the tribe to take in, and he taught them the language of Cortez.
The characters are very real and identifiable. You genuinely care about them. It is well written and directed. The T Rexes lumber, as some scientists still believe. It is only recently that some scientists claim that rexes were speedy, but these are scientists just trying to get their names into print. Good Science dictates that it takes an incredible amount of energy to give speed to that weight. It's like trying to motor a two ton truck as opposed to a motorcycle. The lumbering T Rex still makes more sense.
The characters are well done. Cortez is much like the leader of the treasure seekers in "The Jungle Book", the one with Sabu in it. He is a decent man, who cares about other people, and has humanity, but still wants the treasure. The priest is a very three dimensional character. The romantic two leads are also believable, especially for the times, since they have never seen movies, and don't know what a modern character is supposed to be like. They behave much as you would find credible for the times.
But the chief point of the movie is that it attacks all other horror and Science Fiction movies in a very subtle way. It comes with the idea in the title I gave this, and I wouldn't want to spoil it. Nearly all horror and Science Fiction movies made in the last forty years indicate that some characters are "divinely" above any physical weakness, and that if you're evil enough, you cannot become weak. This movie cleverly attacks that notion.
