Crafted, haunting, genuinely scary ghost story. Simple premise that metastasizes before your eyes and ears. Phenomenal (literally) soundtrack of whispers and radio signals and moans. Nothing wasted. Everything pays off. Serious nods (not rip-offs) to everything from The Shining to Psycho and even The Usual Suspects. Believable performances throughout. Building tension. Great twist at the end. Perfect bookend images. Give it 10 minutes and I think you’ll be hooked. Watch it in original Spanish Language. Hardly need the subtitles. Really spooky I thought.