Police Comissioner Datti is investigating the murder of a female doctor whose murderer seems to be a thirty-fivish year old man. Soon another murder follows: Pianist Robert Dominici’s girlfriend is…

A young opera singer is stalked by a deranged fan bent on killing the people associated with her to claim her for himself.

An American writer in Rome is stalked by a serial killer bent on harassing him while killing all people associated with his work on his latest book.