Bosko in his scrappy, anthropomorphic plane and a fearsome beast in his awesome, cannon-hauling machine are in a dogfight, and Bosko loses. His plane is vaporized in mid-air, but Bosko's fall is broken by the keys of a piano. Bombs have destroyed most of the house surrounding the piano, but the instrument itself is undamaged. Bosko meets Honey, a French girl who happens to skip by. His piano playing impresses her, but the fearsome beast interrupts his performance by dropping a bomb on him. This time Bosko uses a dachshund for an airplane by spinning its head around like a propeller. Now, with a homemade machine gun and the pickets from a picket fence for bullets, Bosko can't lose.
"Dumb Patrol" makes excellent use of Bosko's relentlessly cheery disposition by having him whistle and sing merrily as bombs fall all around him. Honey makes an equally hilarious entrance, by skipping among the ruins as if she were enjoying a day at the park.
Bosko's scrappy airplane has something of a personality, which makes the cartoon seem a bit cruel when it allows the villain to destroy it. But that kind of tart humor is necessary to counterbalance Bosko's psychopathic cheeriness.