Bahía de sangre

A Countess (Isa Miranda) is murdered by her husband who in turn is also murdered. What follows is a series of grisly murders around the former Countess's lake.

Released in Italy with the original Italian title of ECOLOGIA DEL DELITTO and in the US with the colourful title of TWITCH OF THE DEATH NERVE, this classic gruesome Mario Bava giallo thriller set the precedent for a new style of grisly horror films, but would later be recognised as one of the main influences of the slasher genre, most especially the FRIDAY THE THIRTEENTH films, despite Sean S. Cunnigham's denials to the contrary.

A personal favourite of Bava's, the film found itself on the so-called video nasty list in the early 1980s, but is a good fun piece of macabre gruesomeness.