1992 film by Giancarlo Soldi

Adele is suffering from a terrifying recurring dream; a dream that often borders on reality, and even enters it in the form of horrible visions which climax during an evening stroll in the center of Rome. The medical findings don't reveal anything noteworthy and her brother, who was with her that evening, is diagnosed with a simple seizure. Faced with a general skepticism, Adele has no other choice but to turn to the unconventional, so she decides to seek out Dylan Dog - a paranormal investigator