Sharon (Beyoncé Knowles) is shocked and accuses Derek (Idris Elba) of cheating on her with Lisa, after discovering his hidden secrets. | Buy or rent Obsessed here: https://amzo.in/movie/5az/obsessed-2009 Things couldn't be better for Derek Charles. He's just received a big promotion at work, and has a wonderful marriage with his beautiful wife, Sharon. However, into this idyllic world steps Lisa, a temporary worker at Derek's office. Lisa begins to stalk Derek, jeopardizing all he holds dear. © Sony Pictures