Anna Lehmann is driving to her sister's wedding. At a rest stop, the attractive Christoph approaches her. Anna gives him the cold shoulder, he gives her the creeps. A short time later she is pursued by a black BMW. The driver forces her off the motorway and chases her across country. Anna realises that her pursuer is Christoph. She saves herself in a police station and believes her problem is now solved. But on a deserted country road in the Black Forest, the pursuer is back. Full of panic, Anna flees on foot into the forest ...