Young Linda Channing visits her fiancé Ian Faulkner at an old aristocratic residence near London. Here he witnesses several mysterious murders. There are no clues to these murders - only bloody corpses and the terrifying sound that always comes shortly before the murders. Inspector Mark Santini embarks on the investigation and slowly unfolds a story full of old wrongs and terrifying revelations...
| Directing | Bernard Fein | Director |
| Writing | Steve Damon | Writer |
| Production | Arden D. Casey | Producer |
| Crew | Tomislav Pinter | Cinematography |
| Editing | Jana Boháčková | Editor |
| Production | Eva Kučerová | Production Manager |