South-Korean cinema, still one of my favourites since awhile now. They just manage to release some really good movies, unlike their neighbouring countries that rarely bring us decent movies. No overacting with the South-Koreans which is quite rare with Asian actors. Writer/director Kim Tae-joon had the good idea making a crime/thriller about our usage of our smartphones, something a lot of people are just addicted to. You could not have made this movie a couple decades ago, as everybody would have seen it as a sci-fi but nowadays it looks pretty realistic. Certainly the youth that feel the need and urge to share their complete life with the rest of the world, until they will encounter an evil person like in this movie. Good acting, good storytelling with a bit of mystery, and good cinematography, definitely worth a watch.