Phone Booth is a psychological terror film, almost entirely set in a New York City phone booth. Stu Shepard (Colin Farrell), an on-the-go publicist, stops at a phone booth on the street to call one of his clients (Katie Holmes). Unable to talk her into a rendezvous with him, he hangs up, begins to leave, and the phone rings. Out of curiosity, he answers it and sets off a horrifying series of events. The caller is a sniper (Kiefer Sutherland) who has a rifle trained on Stu. The unseen assailant tells Stu he will die if he steps out of the phone booth and terrorizes him mentally and emotionally, forcing him to confess his adulterous intentions to his wife (Radha Mitchell). Also watching are the police negotiator (Forest Whitaker), the gathered crowd and a nationwide television audience.