After inexplicably losing her sight some years ago, Diana (Ilenia Pastorelli) finds an unlikely ally in Chin (Andrea Zhang), a young Chinese boy whom she enlists as her guide. When word spreads of a notorious serial killer plaguing the streets of Italy's cities under cover of darkness, Diana embraces the darkness and, with the help of Chin, pursues the killer to bring him to justice. Dario Argento co-writes and directs the horror-thriller. Co-starring Asia Argento, Andrea Gherpelli, and Mario Pirrello.