Interesting - just 4 people

It's a movie about 3 guys sitting in a car for most of the night trying to work out if readings they are getting are a glitch or the real thing. There's a bunch of clues leading up to the end and at times the music is a bit over the top, and there's a bit of personal drama going on which drives them individually to keep going. It was interesting and I really wanted to see more at the end, but I guess our own imagination is more powerful sometimes.

There is a 4th person but I'll let you see how they come into it.