About the title
Architect Olivia and video game developer Tim are going through a rough patch in their relationship, and Olivia decides to leave. When she packs her things and opens the front door, she is met by a dark brick wall instead of the hallway of their apartment building. The wall repels metal objects and is remarkably sturdy, but the couple has heavy tools at home to break through to their neighbors via the floors and ordinary walls. They soon discover that the wall surrounds the entire building. To get out, the couple must now work with their neighbors, who are also trapped.