When private detective Bob Martin looking for a stolen diamond necklace, he also has a clever serial killer on the trail ...
Dean Reed
as Bob Martin
Fabio Testi
as Francesco di Villaverde
Ini Assmann
as Ellen Kent
Leon Askin
as Peppe Mangano
Werner Peters
as Charly Hollmann
Riccardo Garrone
as Armando Locatelli
Mario Brega
as Riccardo
Hélène Chanel
as Angela
Femi Benussi
as Lois Simmons
Renato Baldini
as Lionel Simmons
Teodoro Corrà
as Rinaldo
Lanfranco Cobianchi
as
