I'm always a bit hesitant to watch found footage films with the haunted house/asylum narrative. They all usually follow the exact same formula with almost the exact same scares. Honestly this one is no different. But of course I watched it because there was no doubt I wasn't going to. And even though it's similar to films like "Grave Encounters (2011) and such, it builds an impressive amount of tension and makes what you'll expect seem fresh. The setup is basic, a production crew goes to a supposed haunted asylum for their reality show to capture ghosts live and break into a room (402) that's locked and so far impenetrable. The first 35 mins are pretty introductory but does a good job of making you feel good with the crew. Once they arrive at the asylum, things unfold naturally at a steady pace with the last 20 mins or so being quite hair raising. Seriously, there were a few instances where things got spooky, for real. This isn't a movie that does anything new or reinvents the "Haunted Asylum" film, but what this South Korean film does do is let you know just because you might know what's going to happen, you shouldn't be comfortable still in the manner that things play out. This one might be in my top 10 for the year.