The movies misses what was really happening... It's like a part 1 of a movie

Rating: 2/10 (31 December 2018)

The drama is very interesting and engaging, but still there's no explanation of why things are happening or what is the cause.
It doesn't make any sense at the end.
I don't recommend this movie. I thought it was going to be similar to "A Quiet place" from John Krasinski , which makes sense why the characters cannot make any noise.
In this movie, However, I didn't get it. I have asked other people and still there are missing pieces.