Sundance 2017: Casey Affleck and Rooney Mara star in director David Lowery’s odd, beautiful little story of loss and acceptance Nobody who makes a serious movie about ghosts ever depicts his spirits as people wearing bedsheets with eyeholes – that’s a cut-rate Halloween costume, right? But David Lowery does exactly that in the Sundance film “A Ghost Story,” which premiered at the Library Center Theatre on Sunday afternoon. And somehow, this guy in a sheet breaks your heart.