Saw is a 2004 American horror film directed by James Wan. It is Wan's feature film directorial debut. The screenplay, written by Leigh Whannell, is based on a story by Wan and Whannell. The film stars Cary Elwes, Danny Glover, Monica Potter, Michael Emerson, Ken Leung, Tobin Bell and Leigh Whannell. In the film, Elwes and Whannell portray two men who awake to find themselves chained in a large dilapidated bathroom, with one being ordered to kill the other or his family will die