Scarlett Johansson plays the title character of Lucy, an american kidnapped by gangsters and forced into drug running for the organization.
After an altercation that ends with Lucy begin kicked in her gut in the location of surgery-implanted drugs, she begins to experience crazy new abilities. These abilities are based on the fictional idea that humans only use 10% of their brain, exploring the concept of what is possible at 20%, 30%, and so on. Going into the movie I figured that would be one of the only ideas I would have to overlook; similar to Limitless I figured this film would explore the idea of a fictional world where a human had increased intelligence. This film is much more ludicrous than that. Scarlett Johansson's Lucy quickly becomes so overpowered that she soon is able to control everyone around her, throw them around the room, or kill them instantly. All ideas you would not really associate with increased brain power.
I found myself enjoying the film more once I was able to get past the idea that this film would be more like Black-Widow-by-brain-drug and more into the mindset of a pseudo super-heroine origin story. Even then the story still comes up a bit lacking. Lucy becomes overpowered so fast that there really is zero suspense throughout the film. Even worse, it becomes increasingly hard to believe that the problems that occur in the movie cannot be handled by the protagonist. Even the idea that she will die if she runs out of drugs seems ludicrous to her God-like ability. When you have a character that can literally do anything you come to expect anything to happen. This is the only reason the film has appeal. Throughout the film the audience is left anticipating just how crazy this tale can go. Lucy also fails on this account by not really going far enough, settling for a middling Transcendence-esque ending.