Short, fat, boastful Gabby finds a boy fishing and offers his advice. Of course, the boy was doing much better before Gabby arrived. In short order, Gabby loses the boy's catch and bait. When Gabby is taunted by a fish, he rents a boat, tackle, and supplies and goes after the fish. Gabby's brief success is cut short when the fish pulls two plugs from the bottom of the boat; with Gabby's hands occupied plugging the holes, the fish raids his lunch box. Time for the secret weapon: a harpoon gun. The fish ties the harpoon line around an old motor, which starts, destroys the boat, and hauls Gabby around like a water-skier. The boy catches him in his net.