When a young opera singer takes over the leading role in an avant-garde presentation of Verdi's Macbeth, she triggers the madness of a crazed fan who repeatedly forces the diva to watch the brutal murders of her friends. Will the woman's recurring nightmare hold the key to the identity of this psychopath or does an even more horrific evil lay waiting in the wings? The legendary Dario Argento (DEEP RED, SUSPIRIA) co-wrote and directed this savagely stunning thriller featuring some of the most shocking sequences of the maestro's entire career. Previously available in the U.S. only in heavily edited form, this horror classic has now been restored from original Italian vault materials and is presented uncut, uncensored and loaded with Extras.