This horror show from director Douglas Aarniokoski will be heaven for devotees of B slasher flicks and zero star hell for pretty much everyone else. Paz De La Huerta (“Boardwalk Empire”) plays a homicidal nurse who preys on cheating men by night with her syringe and scalpel (how original!). Then she meets Danni, a recent nursing-school graduate, and becomes obsessed with her. She tries to seduce her, and when that fails, she resorts to blackmail and more murder. The opening scene is dopey and laughable; what follows is mind numbingly awful. How can a movie scare you when you’ve seen it all before? Consider yourself warned.