A young Turkish woman is found murdered, her face hideously cut. It seems obvious that her husband has murdered her out of jealousy, for just a few hours later he hangs himself in his cell. But Inspector Hunkeler does not believe the solution to the case is that simple and continues to investigate. What was the motive for this gruesome death in the St Johann quarter of Basel? Was it really jealousy and honour? Or could the Turkish mafia have something to do with it?