Salvatore Argento

A razor-wielding serial killer is on the loose, murdering those around Peter Neal, an American mystery author in Italy to promote his newest novel.

Roberto, a drummer in a rock band, keeps receiving weird phone calls and being followed by a mysterious man. One night he manages to catch up with his persecutor and tries to get him to talk but in the ensuing struggle he accidentally stabs him. He runs away, but he understands his troubles have just begun when the following day he receives an envelope with photos of him killing the man. Someone is killing all his friends and trying to frame him for the murders.

A young man returns from Rome to his sister's satanic New York apartment house.

One night, musician Marcus Daly, looking up from the street below, witnesses the brutal axe murder of a woman in her apartment. Racing to the scene, he just manages to miss the perpetrator... or so he thinks.

An American newcomer to a prestigious German ballet academy comes to realize that the school is a front for something sinister amid a series of grisly murders.