I had no idea what this film was about when I started watching it. Looking at the movie poster, you can assume it has something to do with SF. But I didn't expect it to be such a brilliant film. Compared with other great well known SciFi's, "The Signal" is more of a modest movie. This will probably also be due to the small budget (4 Million Dollars). But despite this small budget, this magnificent indie has some very successful moments with hallucinatory special effects.