Basically a bunch of short films that take place in the same universe at the same time; the stories are tied together by a person or piece of technology being in two or more plot lines. The plot lines are basically mini-episodes of Black Mirror asking "wouldn't life be creepy if technology did this?" sort of thing. Supposedly the theme of these stories is supposed to evoke thoughts about the meaning of life... I didn't get that at all. To me I just thought it was an entertaining way to spend 80 minutes. Would I watch it again? Yes, actually, but with other people, not alone. These sorts of movies/shows are fun to talk about with people because the concepts depicted are fairly thought provoking even if (in this case) the movie is nothing special. It's not good but it is thoroughly entertaining so worth a watch at least once.
Review of Warning
