Ellen receives an exotic mask by mistake and begins to have waking nightmares and hallucinations. Her husband and doctors believe she is a paranoid schizophrenic and take her to a psychiatric ward. On the way to the hospital the car breaks down, her husband rushes off to get gas, and the Nightmare Man appears. Ellen escapes and stumbles upon a country house where two young couples are spending the weekend. They do not know if the killer is real or just a figment of Ellen's tortured mind nor if the killer is outside or already inside the house.
Unfortunately the movie Nightmare Man is not yet available on HBO Max.
| Writing | Rolfe Kanefsky | Writer |
| Directing | Rolfe Kanefsky | Director |
| Camera | Paul Deng | Director of Photography |
| Art | Ann Nord | Art Direction |
| Editing | Victor Kanefsky | Editor |
| Costume & Make-Up | Stacy Ekstein | Costume Design |
| Costume & Make-Up | Heide Kacser | Makeup Designer |
| Production | Esther Goodstein | Producer |
| Production | Rolfe Kanefsky | Producer |
| Production | Victor Kanefsky | Producer |
| Production | Frederico Lapenda | Producer |
| Sound | Christopher Farrell | Original Music Composer |
