Three male friends convince themselves that they have various illnesses, each brought on because of too much work. They prescrive themselves a four day holiday. After discussing other options, they settle on a boating trip, travelling on the Thames by day and camping out in the hired boat at night. The following Saturday George has to work in the morning, but the other two take their bags and dog and set off on their trip. George will join them later. They get a cab to Waterloo station, but they miss their train. They get another train to take them and George meets up with them with a mysterious package under his arm. They embark on their boating trip advententure.