Signal is a really interesting sci fi movie. Its cinematopraphy and cast make it work and it is something different in a good way. Three friends are trying to track down a mysterious hacker somewhere in the Nevada desert. Their passion lead them in an abandoned place where everything is going to change. The real terror begins after this incident and trough some artistic nostalgic-type flashbacks, the storyline delivers a great plot. The pacing is slow and methodical, doling out information in carefully measured doses before opening the floodgates during the film's climax. For a medium budgeted film, it sure does looks amazing. I can say it is a mindbender for serious sci fi fans.