A series of mysterious murders is causing headaches for the country's secret services, who are discreetly but persistently investigating every aspect of the case. With the help of various coincidences, it is revealed that the crimes are linked to the activities of foreign agents operating in Greece. As it turns out, all these agents—although their origin is not specified—are trying to steal a series of valuable and highly classified documents related to some "serious" experiments being carried out secretly at a NATO military base. Espionage against espionage and constant chases.

A mysterious disappearance takes place during the shooting of a commercial on the beach in the early morning hours. An unknown man suddenly comes into the shot, then walks into the sea holding an umbrella and seizes to exist, before the bewildered eyes of the whole crew. After the police are notified, a confusing array of red tape manoeuvers begins, revealing the close affiliations of the Authorities with the advertising company manager and the whole mechanism of Mass Media, all of which are trying not to investigate the event but to conceal or even exploit it in their own interest. Only the musician involved in that commercial is trying to figure out what really happened.

After leaving Nafplio, the first capital of the newly founded Greek Nation, the affluent French Duchess of Plaisance and ardent philhellene, Sophie de Marbois-Lebrun, moves to Athens with her young daughter, Eliza, circa 1834.