I think Yojimbo-19 was a bit harsh by giving this episode a 1. However, they were 100% right about this basically being a rehash of "The Seven Samurai" (later, "The Magnificent Seven") and shows poor writing. I also think "Star Trek: Enterprise" was not a bad series at all--but because there'd already been a HUGE number of Trek shows*, it isn't surprising that there would be a few klunkers because the idea well started drying up.
The show is pretty much what you'd expect with such a derivative plot. A mining camp is being attacked and mistreated by some nasty Klingons. In the past, the Klingons even killed a few of these folks just to teach them their place! Archer and company naturally don't like this and stick around to show these folks how to fight for themselves. Unfortunately, the ending makes no sense, as they capture the Klingons and then just let them and their ship go. If there is any consistency at all in the series, Klingons won't just disappear and most likely came back and murdered everyone or simply blew up the camp from space. Duh.
By the way, in this and other shows the crew talk about needing Deuterium for its engines. While they make it sound like a mineral, it's actually a liquid--often nicknamed heavy water or heavy hydrogen. And, it's NOT mined but separated from water.
*Think about this. The original "Star Trek" lasted three seasons. "Star Trek: The Next Generation", "Star Trek: Deep Space 9" and "Star Trek: Voyager" all lasted seven seasons. So, before "Star Trek: Enterprise", you've already had about 24 seasons of Trek shows! No wonder the ideas sometimes seemed recycled or borrowed.