Ghosts—or maybe just actors playing them—haunt Jamie Isenstein’s exhibition “Para Drama.” With rustling sheets, a bed appears to make itself, providing a theatrical suggestion of an otherworldly presence. Animated not-so-mysteriously by an unseen person, the sculpture effectively becomes the site of a long-durational performance. Yet the epic grandeur that frequently accompanies such undertakings (see Marina AbramoviÄ?) is here replaced with a casual vibe and low-key humor. In other works, ghosts are presented as figures of absence. The most basic form of the Halloween costume—a sheet with eye holes cut into it—hangs flat on one wall, deflated and reduced to an empty abstraction. Two sculptures from the “Onion” series (2015) include nested sets of masks placed over the head of a mascot: layers of artifice to be peeled away until nothing remains.