The film begins in the cluttered apartment of an unemployed actor, We become familiar with his way of life and routine. As he carries out his daily tasks, he becomes aware of an unknown threat. We watch as a stranger follows him and makes his presence known in increasingly disturbing ways. The more the actor tries to elude the danger, the more persistent the stranger becomes. As the film progresses, we become involved in the horror-fantasy that is his constant companion. The stranger silently confronts him in the subway and in the streets; becomes a terrifying opponent in a fencing match and eventually traps him in this apartment. In desperation, he flees to the roof where his attacker confronts him. Suddenly the actor realizes that he is in front of a movie camera and is being encouraged to perfom. His actor's instincts take over and he begins to sing and dance for the camera. The intensity of his performance increases. He is loved. He has found approval. As the camera pans closer and closer to the edge of the roof, the actor, in the glory of his performance, falls to his death.