The Kurdish-Iranian director Bahman Ghobadi, who made the unforgettable A Time for Drunken Horses, here turns his attention to Tehran's underground world of prohibited rock music. In a reconstructed documentary, a motor-mouthed confidence trickster escorts a group of young musicians around this dangerous scene and promises to obtain passports and visas so they can emigrate to London. A raw, scary, despairing film that, like most of the best Iranian films, has been banned at home. Ghobadi, I believe, is now living abroad.