This film is one of those rare films that you'll come out and argue about with complete strangers, it polarised the world. The basic story is to try and implant an idea in someone's head without knowing that it's a foreign idea whilst they're in some kind of dream state. The main character, played by Leonardo di Caprio, constantly has an object on him that is supposed to keep him grounded in his idea of reality and dreaming. However, the lines become blurry and after rewatching the film, you really are uncertain of basically everything.