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.
Claudine Auger
as Renata Donati
Luigi Pistilli
as Alberto / Albert
Claudio Camaso
as Simone / Simon
Anna Maria Rosati
as Laura
Chris Avram
as Franco Ventura / Frank Ventura
Leopoldo Trieste
as Paolo Fosatti / Paul Fosatti
Laura Betti
as Anna Fossati
Brigitte Skay
as Louise / Brunhilde
Isa Miranda
as Countess Federica Donati
Paola Montenero
as Sylvie / Denise
Nicoletta Elmi
as Renata and Albert's Daughter (uncredited)
Renato Cestiè
as Renata and Albert's Son (uncredited)
