ideas

starts off with woman running the bath then goes downstairs to lock the door & you see a man walk past the window, she then walks up the stairs and as she reaches the top the man appears in the hallway
as she's getting undressed you see him creeping up the stairs


Sharp flashy images of women getting undressed switching to man coming upstairs

someone laying on the floor
person being put in the boot
car driving towards forest
hole being dug
drags body from car to hole