Anthony Steffen, Sylva Koscina, Giovanna Lenzi, Giacomo Rossi Stuart, Shirley Corrigan, Renato De Carmine, Umberto Raho, Annabella Incontrera, Romano Malaspina, Imelde Marani, Isabelle Marchall
In Copenhagen, a blind pianist hunts the culprit in string of murders, each linked by the presence of a yellow shawl and a black cat.