Blood and Black Lace

Blood and Black Lace (Italian: Sei donne per l'assassino) is a 1964 Italian Horror / Thriller Film directed by Mario Bava, who also co-wrote the screenplay with Giusseppe Barilla and Marcello Fondato. The film, starring Cameron Mitchell and Eva Bartok, concerns the stalking and brutal murder of several fashion models by a white-masked killer who is desperately attempting to recover the diary of Isabella, one of the models and the first victim, containing potentially scandalous information on the fashion house's various indiscretions, including abortions, blackmail, and drug addiction. It soon becomes a race against time as the diary changes hands repeatedly, separately pursued by the police investigating Isabella's murder, and the mysterious figure who is willing to kill to prevent its secrets from being revealed.

Blood and Black Lace contains examples of:

 * The Blank
 * MacGuffin: The diary.
 * Police Are Useless: The main detective is a complete joke and is no closer to solving the case the last time we see him than he is when we first do.
 * Slasher Movie
 * White Mask of Doom