Demirkubuz sets the second film in the “Tales of Darkness” trilogy in the capital city of Ankara, a middle-class bastion. But the film brings a chilling, Dostoyevskian feel to its searing look at the disintegration of a marriage. Harun (Taner Birsel) and Nilgün (Basak Köklükaya) have been married for seven years. Their relationship seems uneventful enough, with little outward strife. Then Harun suspects his wife of having an affair. Yet he fears that confronting her might actually bring the affair into the open-or end the marriage. As time passes, the uncertainty itself begins to alter their marriage. With excellent performances from his two leads, Demirkubuz makes Confession a deeply moving study of people living with unhappiness and the toll it takes on their daily lives. There are neither heroes nor villains here, just victims.