Dick and Duncan are both smitten by the lovely Anna-Maria, a glamorous Austrian passenger. Dick gets to bandage her finger but Duncan,as the senior officer, takes over and keeps Dick away from her by forcing him to make animal noises in a talent contest. Anna-Maria is persuaded to enter a beauty pageant which she wins. However she has also attracted the attentions of the captain and when Duncan goes to her cabin, finds Loftus there in a compromising position.

The purser finds a pair of trousers with the name tag 'Manuel Sanchez' on and knows there is a stowaway on board. Dick finds him hiding in his wardrobe. He tells him he came to England for work but missed his girl-friend in Tenerife. Then Duncan finds him and gets a different story. The two doctors finally work together and, at Tenerife, dress Manuel as a souvenir vendor, knowing the purser will throw him off the ship as he wants.

Dick is running a late night poker school and a money exchange for passengers but collapses from the stress of it all and needs bed rest. He gets Duncan to take over but Duncan fumbles the exchange, giving the passengers overly generous rates and is hopeless at poker, losing to Captain Loftus, who finds out about it and wants to be included. Finally Duncan collapses from exhaustion - as does the purser.