Basking in the rays of the sun, Plump and Runt arc rudely awakened by some overworked sailors and offered work. "Who ever worked, while the larder was full?" answers Plump, showing their larder, a two-week-old weeny. Disgusted, the sailors plan to shanghai the two loafers and our two heroes, some days later, awake to find themselves at sea. They are put to work now, but, diving overboard, after a three days' swim land on a desert isle, where they meet a family of castaways. Here an ideal life is led. Between intervals of eating the tropical fruits and sleeping, the pair make love to the daughters of the family and everything goes happy as the marriage bell. One day a small boat is sighted and the whole crowd embark only to find that the oars are missing. What is to be done? An idea strikes one of their number. A rope is tied around Plump's neck and much against his wish, he is pushed into the water and the long voyage starts. After several days the loiterers on a distant shore observe a boat approaching with no visible means of propulsion. Nearer and nearer it comes, and to their amazement, a head appears from the depths, followed by the big body of Plump, terribly tired, but happy after his long walk on the ocean's bed.
—Moving Picture World synopsis