An attractive nurse named Meredith moves to the Langrock estate to take care of her patient:a crippled old man.She falls in love with sixteen year old grandson of Langrock named Gabriel,who returned from some kind of desert commune.A series of brutal murders in the gloom of the night is set in motion...Slow-moving but well-made and competent psycho slasher that often drags.The death scenes mostly involve head bashings and are pretty bloodless.I liked the main performance of Patricia Pearcy as I remembered her from Jeff Lieberman's "Squirm"."Delusion" is worth checking out for completists of 80's US independent horror.6 out of 10.