The average person uses 10% of their brain capacity. Imagine what she could do with 100%.

What could one human do if they unlocked 100 percent of their brain capacity and accessed the furthest reaches of their mind?Lucy (Scarlett Johansson) is tricked by her boyfriend into delivering a briefcase where she is grabbed and held hostage by the merciless Mr Jang (Choi Min Sik). His thugs surgically implant a package loaded with a powerful synthetic substance in her to smuggle it across the border. The package leaks and she develops superhuman traits. Lucy enlists the help of Professor Samuel Norman (Morgan Freeman), whose decades of research on the brains potential makes him unparalleled in the field and the only person with the ability to see where this might lead. Relentlessly pursued by her former captors Lucy begins to turn the tables and transform into a warrior evolved beyond human logic.