Being kept in the shadows is a major theme of 10CL, both in a literal and metaphorical sense. Throughout the movie we're never quite sure who is trustworthy, who holds the power, and what will happen next. We know there was a car accident, we know there are three people in a bunker, and we think there might be something happening out in the world, but we only have guesses as to what it is.
10CL hits hard with the creep factor, and all three principal actors are spot on for their roles. I loved the soundtrack, the simmering suspense, and how the story kept me thinking the whole way through (and then some).