A mysterious stowaway opens the door to adventure for two unsuspecting holidaymakers in this comedy feature from Herbert Wilcox, produced by and starring Michael Wilding at the peak of his fame, with an early role for French actress Odile Versois and strong support from Jack Hulbert and Constance Cummings. Enjoying a holiday in the sun, Mr and Mrs Fergusson are relaxing on board a chartered yacht off the coast of France - their only crew, the skipper-owner and his adopted daughter. On taking a turn around the deck, Mr Fergusson is rather put-out to discover a stowaway helping himself to the comforts of their dinghy. Though very charming, the stranger refuses to give any explanation for his presence - and the Fergussons soon find themselves involved in a rather more eventful sailing trip than they had expected.