An engineering graduate supervising the demolition of a mysterious building unearths some unsettling secrets about the pristine building and its previous inhabitants in this dark psychological thriller starring Mischa Barton. Adapted from Serge Brussolo's graphic novel of the same name, Walled In follows fledgling engineer Sam Walczak (Barton) as she ventures deep into the countryside, where the monolithic Malestrazza Building is being prepared for demolition. Constructed by an obsessed architect, the Malestrazza Building has a chilling history. Many of the previous inhabitants were entombed alive in the massive structure, and the deeper Sam digs into the life details of the eccentric architect who designed it, the more convinced she becomes that she will be the final victim in its malevolent legacy. Perhaps by confronting her own sordid past, Sam can escape the curse and somehow find a way to start life anew.