Curtains is a 1983 Canadian slasher from the makers of the successful 1980 slasher Prom Night that aspires to pretenses above its raisin' and resultingly has a lot of compelling scenes and ideas that never mesh with the basic slasher plot it's trying to make its bread on.
It's essentially a classic Grand Guignol, with shady doin's in a "haunted" house, of sorts, blending source elements as disparate as All About Eve, Three Little Indians, Valley of the Dolls and…