The Milanese fashion guru Roberto Minghelli embarks with his wife on a cruise. One morning he wakes up in a now-sunken ship but is able to escape to an island, where he finds an abandoned hut which had a famous owner, Robinson Crusoe. Although the city slicker seems to be completely unsuitable for survival on a deserted island, Roberto adapts over time to his location and even leads a relatively happy life. But then he discovers that he is not alone on the island: a pretty young native, whom he calls Friday, joins him, and things start to be more complicated.