该片是由赛尔乔·马蒂诺执导的恐怖片,于1972年上映，主要.讲述了:Oliviero is. a .burned-out writer, livin.g at his est.ate ne.ar Ven.ice, his .dead mother dominating his .imagination. He is. al.so a degenerate.: sleeps wit.h his maid and his ex-st.udent, hosts Ba.cchanalia for l.ocal hippies, and hum.ili.ates his wife I.rin.a in front of strangers.. She lives i.n terr.or. Wh.en a youn.g woman is murdered, police. suspect Oliviero.. Th.ings get compli.cated when h.is young, beautiful, and. self-confident. niece, Florian.a, pays an unexpected. vi.sit. A silver-h.air.ed stranger observes. Mo.re women die., and .though.ts of har.ming Irina give Oliviero ne.w inspiration. Wha.t's. Floriana's gam.e and who's .the observant stranger? .Watching all is. a black cat na.med Satan.