A psychologically disturbed man is haunted by a disembodied dummy head and a mysterious man completely shrouded in black.

No one knows what is true. The last known surviving witness recalled a murderous dummy head commanded by a mysterious man in a dark trench coat. The original incident was initially considered to be the result of vivid hallucinations and mass insanity. But over the past 20 years, the doctor's research has led him to be a believer.