Two families embark on a pleasant Sunday picnic but manage to run into a variety of issues with their temperamental automobile. Each incident requires repeated exits and reboardings by Laurel, Hardy, their wives and grouchy, gout-ridden Uncle Edgar.
Schoolboy Donald is torn between his angel and devil sides, though in Donald's case, the devil side isn't hard to resist. But the smoking he's encouraged to do turns him green and gives him regrets, and when the good side shows up and kicks evil's butt, Donald cheers.
Donald's sister Dumbella sends her three sons Huey, Dewey, and Louie to visit their uncle Donald. They prove to be quite a handful for Donald, even with help from his book on child rearing.
Oliver is making plans to marry his sweetheart Dulcy with Stan as his best man, but the plans are thwarted when Dulcy's father sees a picture of Ollie and forbids the marriage. The couple plan to elope, and run away to a Justice of the Peace. After typical Laurel and Hardy blundering, they manage to sneak the girl away from her father's house.
Spike the bulldog, grateful to Jerry for getting him out of the dogcatcher's van, offers to help the little mouse any time he whistles. Tom, Jerry's feline tormentor, seeks to overcome this new disadvantage.