An American novelist visiting Rome to promote his latest book is stalked and harassed by an obsessed fan who is committing a string of murders that appear to be tributes to his work.
The wife of a struggling businessman is blackmailed by a mysterious man into having a sadistic affair with him, or he will leak evidence implicating her husband of murder.
Two strangers awaken in a room with no recollection of how they got there, and soon discover they're pawns in a deadly game perpetrated by a notorious serial killer.
A mute woman finds herself at the center of a series of murders in the mountains of Spain, which police suspect are being committed by a drug-addled Satanist.