A Bay of Blood(1971)
An elderly heiress is killed by her husband who wants control of her fortunes. What ensues is an all-out murder spree as relatives and friends attempt to reduce the inheritance playing field, complicated by some teenagers who decide to camp out in a dilapidated building on the estate.
Directed by Mario Bava - With Claudine Auger, Luigi Pistilli, Laura Betti, Claudio Volonté, Leopoldo Trieste, Isa Miranda, ...