Gordon, the former keeper of a lighthouse now turned into a museum, is desperate for someone to help him maintain the site. When Musa, an Afghan refugee, comes knocking on his door, Gordon finally finds the helper he has been waiting for. The two men become friends, confronting their respective cultures and pasts with humour and kindness. But when Gordon discovers the true intentions of Musa's visit, he is faced with a moral dilemma that upsets all his certainties...