Nattmara (1965)

A woman is driving alone one evening, when she almost run over a man lying in the road. She gets out of the car to see. Suddenly the man attacks her. Eva Jansson's dead body is found by a local farmer, who calls the police. Soon after fashion designer Maj Berg comes driving the same road and is stopped by the police. When the road is cleared for traffic Mrs. Berg drives on but happens to get a flat tire. While changing to the spare wheel, she finds a black notebook in the ditch. Back in Stockholm she opens the notebook and finds a strange jotting that concerns her.