Thom and Romina have just scored the coolest apartment in the city. Located above a trendy coffee shop, it's got high ceilings, exposed brick, and tons of space to stretch out. The only part they aren't crazy about is the little square doorway in the bathroom that leads to a cavernous attic. When a former tenant, an eccentric older man named Walter Severich, shows up and asks for a tour, things start to get really strange. Soon, Thom and Romina are convinced that someone, or something, is living in their attic, but the only way to know for sure is to crawl inside and look.