A family of 4 makes a long drive to Aunt Martha's house to visit her for the first time in years. Only she isn't there. Just the caretaker and his message that she will appear the next day...if they survive the night.
Unfortunately the movie The Murder Secret is not yet available on HBO Max.
| Production | Antonio Lucidi | Producer |
| Sound | Gianni Sposito | Original Music Composer |
| Production | Luigi Nannerini | Producer |
| Production | Lucio Fulci | Producer |
| Directing | Mario Bianchi | Director |
| Editing | Vincenzo Tomassi | Editor |
| Production | Lucio Fulci | Production Supervisor |
| Writing | Mario Bianchi | Screenplay |
| Writing | Mario Bianchi | Story |
| Art | Vincenzo Luzzi | Property Master |
