In the "Swinging Munich" of the late 1960s: The young millionaire daughter Carroll Buchheim, an American, flew from the United States to Germany to visit her brother, who is missing.
A German businessmen is sent to Stockholm by his boss to secure an important contract, in the face of foreign competition. He discovers that the intended client has gone sailing round the Swedish islands and follows him. He becomes mixed up with a mysterious young woman named Maibritt, who eventually turns out to be the daughter of his intended client.