After earning raves and a BAFTA nomination for his debut feature Shell, writer-director Scott Graham returns with Iona, another Scottish film set far off the beaten track. As Graham himself explains, his new film “is about a young woman [Iona, played by Ruth Negga] who goes back to the island of her birth [the isle of Iona] with her teenage son [newcomer Ben Gallagher] to hide from a crime they’ve committed. The film opens in a kitchen in Glasgow. There’s an act of violence that they run from, and the rest of the film takes place on the island. And really the story is about the impact that going back to the island has on her and her son, and also on the family that she left behind when she was a teenager….