Milan Mumin, a Serbian rock star now driving a cab in New York City, plays a fictionalized version of himself in this low-key indie drama. He dreams of making it as a musician in America, though his longtime girlfriend, newly arrived from Serbia, wants him to come home and find a stable job; stalling her, he continues to work on new material and, in the process, grows closer to his female bassist. The premise might remind you of John Carney’s Once, but this is grittier and less sentimental, grounded in disappointment and working-class drudgery. Writer-directors Nemanja and Brane Bala are brothers and themselves Serbian immigrants. In English and subtitled Serbian.