The movie itself wasn't bad, the problem for me is that it is exactly the same plot and twist as the 2005 movie Reeker. I liked Reeker, it was surprisingly good for a low budget movie. The Circle felt like a shoddy imitation.
Now for the spoilers, which apply for both movies.
5 people (3 guys and 2 girls) are driving along and almost get into an accident. A bit later they end up in a different location from what was originally planned. They find a place to stay for the night. The strange killings begin. There is a demon/evil thing picking them off one by one. It gets down to the last girl who is rescued. And for the twist... it was all a "dream" as they didn't actually avoid the car accident. Then a little thing happens and we're supposed to think that maaaaybe it wasn't a hallucination after all. So you can see why I couldn't help but compare to two!
Reeker has better cinematography and believable acting. Again, The Circle wasn't that bad. I say watch them both and you can decide. Or if you've seen Reeker and hated it you can definitely skip this one.