Franco Riva, a geologist who works in Ivory Coast, suddenly returns to Italy, to Genoa, to see his girlfriend, Claudia Fiori, of whom he has not heard for some time. Riva gathers various information about his fate. The concierge of her apartment, which she left two months ago, claims that Claudia has rented a house on the Riviera and got married. Instead, Claudia's sister, Laura, excludes that she might have gotten married without telling her anything and shows the man a postcard that Claudia sent her from Stockholm, where she told her that she was moving for the company where she worked. But the owner of the company, Piero Ricci, denies even the existence of a branch in Stockholm. So Franco turns to the police...