The trailer for Walled in promises a much more visceral experience, implying that characters get trapped and concreted into the walls in this film. What you actually get is Mischa Barton's character showing up after any of that has occurred and finding herself drawn into the history of the bizarre building she's been commissioned to destroy. She's further diverted by the few remaining wierdo tenants who are sticking it out to the end, including a wierd old lady and the strange son of the building's landlady/housekeeper. Cameron Bright plays his character as a mix of peculiar secrets and puppy-love adoration for Mischa's demolition engineer, and soon the two have formed an unlikely buddy act as they delve into the building's well-publicised past.
There's some nicely built up suspense, and some anxiety is wrung out of Mischa's character ending up involved in an interesting twist, but that's largely all there is to this suspense drama. It's completely lacking the full-on horror promised by the cover and trailer, and for that, having mis-sold itself, it was a let down. In its own right it's an interesting thriller, but you're unlikely to come to it without having been mis-led by the marketting.