This movie is based on a horrific real life tragedy; the Tate murders.
I think, one of the hardest things to do, is to make an adaptation of real life events. I don't know if this killing spree even needs a dramatization, but I'm sure it doesn't need one, that uses all the bad clichés and style elements of the tired genre of the slasher film. This movie tries to depict the horror of that night, but in a very irritating manner. I felt frustrated throughout by the very bad direction and the lack of respect for the subject. The bad rating is justified.