There is a loss of manpower on the Begonia because Dick has been doling out sick notes or chitties to the crew. Captain Loftus discovers this and threatens to sack him. Industrial action is called. However, when the ship arrives in Madeira nobody wants a chittie, as it would mean missing shore leave. Dick has been fooled by the crew. He has, however, made money by selling the chitties at two pounds a time.

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.