Premise: American Psycho is a 2000 American black comedy horror film co-written and directed by Mary Harron , based on Bret Easton Ellis 's 1991 novel of the same name . Patrick Bateman is a fictional character , the villain protagonist and narrator of the novel American Psycho by Bret Easton Ellis , and its film adaptation .
Hypothesis: Patrick Bateman is the villain protagonist of the 2000 film adaptation American Psycho.
Label: ENTAILMENT