The film stars Jake Gyllenhaal as Lou Bloom, an impromptu freelance videographer who begins covering the crime world in LA for a local TV station. Almost as dark as a mystery can get, it is disturbing, and plays out as a combination of "Drive" and "The Network". The film is visually stunning as well as immensely suspenseful. It then becomes almost impossible to look away, even when you're the most horrified by just how far Bloom is willing to go to reach success. Gyllenhaal's performance is widely compared to that of Robert De Niro in Taxi Driver, which should give you an idea of its caliber.