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 and Leigh Whannell as two men who find themselves chained in a dilapidated bathroom, with one being ordered to kill the other or his family will die. It is the first installment of the seven-part Saw franchise.