Limitless is a 2011 American thriller film directed by Neil Burger and starring Bradley Cooper, Abbie Cornish, and Robert De Niro. It is based on the 2001 novel The Dark Fields by Alan Glynn with the screenplay by Leslie Dixon.
Edward "Eddie" Morra (Bradley Cooper), standing on the rooftop of his luxury penthouse. Someone is trying to break into his apartment, as he prepares himself to jump.
Three months earlier, Eddie is a New York City author struggling with writer's block and a deadline. His girlfriend, Lindy (Abbie Cornish), dumps him, after growing tired of supporting him financially. One day, Eddie comes across Vernon Gant (Johnny Whitworth), his ex brother-in-law. Vernon, a drug dealer, offers Eddie a nootropic drug, NZT-48, claiming that it was just approved by the FDA and that it allows the user to access 100 percent of the brain's capacity.