Fashion-designer May Berg is driving alone one evening, when she almost run over a man lying in the street. She gets out of the car to see. Suddenly the man attacks her, trying to strangle her. The assassination attempt fails, but it is followed soon by new, mysterious attempts to kill her. She is driven more and more into a constant fear of her life. Her husband trivialize the whole thing and even the police is skeptical of her claims that she is stalked by someone trying to kill her.

Una signora è perseguitata da un misterioso assassino che la conduce quasi sull'orlo della pazzia.

Modedirektrisen Maj Berg kommer ensam körande i bil en kväll. Hon bromsar in häftigt, när hon ser en man ligga tvärs över vägen. Hon stiger ur bilen för att se om han är död. Då reser han sig, kastar sig över henne och försöker strypa henne.