A serial killer is terrorising the students of Bologna. Detective Grazia Negro is determined to solve the case. Only one eye witness can identify the killer and he's blind. Simone likes to imagine what people are like, based on the tone and colour of their voice, and his acute hearing sets alarm bel...

A serial killer is terrorising the students of Bologna. Detective Grazia Negro is determined to solve the case. Only one eye witness can identify the killer and he's blind. Simone likes to imagine what people are like, based on the tone and colour of their voice, and his acute hearing sets alarm bells ringing upon hearing the voice of the killer.