Set in 1939 and told through the intertwining perspectives of characters enmeshed in a bizarre love triangle, writer-director Graham Swon’s sophomore feature An Evening Song (for three voices) is as visually robust as it is dramatically intimate. The story revolves around married couple Richard (Peter Vack) and Barbara (Hannah Gross)—a pulpy crime writer and a prodigious novelist, respectively—who move to a rural Midwestern town after years of city living. Shortly after arriving, they hire a local young woman named Martha (Deragh Campbell) who the couple find independently alluring despite (or perhaps largely due to) her striking innocence and pious nature. […]