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.
Anthony Steffen
as Peter Oliver
Sylva Koscina
as Françoise Ballais
Giovanna Lenzi
as Susan Leclerc
Giacomo Rossi Stuart
as Victor Morgan
Shirley Corrigan
as Margot Thornhill
Renato De Carmine
as Inspector Jansen
Umberto Raho
as Burton
Annabella Incontrera
as Helga Schurn
Romano Malaspina
as Harry
Imelde Marani
as Harry's girlfriend
Isabelle Marchall
as Paola Whitney
