A blackmailer awakens memories of a 20-year old crime, sending one of those involved on a killing spree. Meanwhile, Tracy [Rosa Nichols] is having nightmares of her time in an orphanage, and her boyfriend, Richard [Korey Duke], is obsessed with finding the root of these dreams. With the help of a psychiatrist friend [Tim Taylor] and hypnotist Charles Branson [Larry Jack Dotson], they push Tracy back through the doors of the orphanage to where the secret to her past and the present crimes lies. Will they be able to piece together Tracy's memory in time?
Four Sisters has some serious flaws. The blood work is not well done; the blood is uniformly red, no differentiation of arterial and venous streams, none of the viscosity that we know and love. The wounds appear shallow, at best. There are some serious continuity issues; in one scene, a woman is grasping at her unmarked neck only to start bleeding a cut shot later. Still, as obvious a red herring as Brenda is, the reveal is a surprise; the evidence seemed to point more to Tracy than anyone else.
As a giallo, this is not one of the best. There is none of the excellent effects or spectacular cinematography that you see with Bava, Argento, and Fulci. Sisters Four is more than just a slasher film, and more than just a mystery, but it leaves you wanting to watch Deep Red or Hatchet for the Honeymoon.
