Three persons, Susan and Philip Ashlow and Henry Brittingham-Brett are washed ashore on a deserted island after a shipwreck. Henry is Susan's lover. Since the island is filled with things to eat, they can concentrate on the love triangle between the men and the woman.
Niven juggles three coconuts somewhat clumsily, but he does it himself. Granger responds with a perfect little routine, but doesn't really juggle himself, which is apparent if you notice the film tricks, in slow motion if possible. Granger makes an amusing statement about juggling.