Obsessed is a thriller film released on April 24, 2009. The film was written by David Loughery and directed by Steve Shill. Obsessed centers around Derek Charles (Idris Elba). He is married to Sharon (Beyonce Knowles) and the two have an infant son named Kyle (Nathan and Nicolas Myers). Derek is a succesful business man, the Executive Vice President of Gage Bendix. He is given a new temp Lisa Sheridan (Ali Larter). Lisa begins to put the moves on Derek, but Derek rejects her advances. Angry from being rejected, Lisa begins stalking Derek and causing problems between Derek and Sharon. She goes as far as following Derek on a business trip, trying to seduce him in his hotel room. Eventually, when Lisa realizes Derek is not going to leave his wife, she turns violent. Obsessed is the type of film that will have you guessing what will happen from the opening credits to the last-minute.