Kitty, a photographer living in Rome, witnesses the murder of a young woman at the hands of a razor-wielding black-gloved killer. Kitty and her fiancé Alberto go to the police, only to learn that two other witnesses to the crime have been slashed to death.

Robert Hoffmannas Alberto Morosini
Nieves Navarroas Kitty
George Martinas Inspector Merughi
Simón Andreuas Marco
Rosita Toroshas Nina Ferretti
Nerina Montagnanias Marta