"Delusion" (also released as "The House Where Death Lives") follows a young nurse who goes to work at the Langrock estate to care for a dying millionaire. After the arrival of the elderly man's troubled nephew, anyone connected to the home begins to die at the hands of an unseen killer.
This pseudo-psychological slasher film has mostly been forgotten, and registers as one of the more obscure of its peers, though not entirely for good reason. It's not a great film by any stretch of the imagination, but it is reasonably well-shot and captures a claustrophobic, isolated atmosphere. The film falls in familiar trappings and does little to distinguish itself, but it does drum up a bit of intrigue with a couple of its murder scenes (each of which are clobbering administered by a loose table leg, oddly enough) which are well-executed.
The acting is a mix of poor to decent, with Joseph Cotten playing the ailing patriarch, and Patricia Pearcy (of 1976's "Squirm"), who here seems to be overplaying catatonia a bit much, though she does a generally serviceable job. I actually found the letter voice-over narration an interesting way to frame the film, and certainly not one used often, especially in slasher films. The finale comes together a bit quickly and feels slapdash in nature, though it's mildly satisfying.
Overall, "Delusion" is a middling slasher film, part psychological thriller and part murder mystery. It's certainly not original, but it is relatively well-shot and has a few moments scattered throughout that drum up a bit of suspense. Its limited locations exhibit what I presume was a low budget, but there is a hazy air about the film that leaves it feeling a bit like a fever dream. Not great, not terrible—certainly unremarkable, but worth a watch from slasher completists. 6/10.
