Not a bad movie if you analyze its purposes. However, its narrative is cold and Lucy, although Johansson plays it very well, is not a charismatic character, dramatically speaking. The ending is predictable and the subject of the movie has been approached many times before. It begins well, but it ends in a very disappointing way. To sum it all up, it's a movie that tells how a girl had an overdose from blue crystals and started reading minds, controlling tv and telephones and going back in time. Seriously, that's all.