Jafar Panahi’s film about revenge and responsibility tells of a group of people who think they have found the man who tortured them in prison, but won’t take action until they’re certain about his identity. A film style that is deceptively simple with a profound effect—this is a rare and wonderful thing. Iranian director Jafar Panahi has a style like that, and never more than his recent film, winner of the Golden Palm at Cannes, called It Was Just an Accident. The title is from the opening sequence: a man is driving his wife and young daughter home from an…