Walled In

Walled In is a 2009 horror/thriller movie that was produced by Kevin DeWalt and directed by Gilles Paquet-Brenner.
Plot.
The plot of the movie is based on the best-selling novel "Les Emmures" and is about a woman (Mischa Barton) who discovers past residents who were entombed within the walls of a building by a vicious murderer.