Betty Boop and her friends Koko the Clown and Bimbo have been hired to demonstrate a series of crazy gadgets at the Big Invention Show. After a more or less successful presentation of fanciful appliances such as an anti-slurp soup silencer or spot remover that removes the spot.. and the cloth!, a revolutionary sewing-machine goes wild and Betty and Bimbo can only find safety in flight. Paradoxically it is another invention that rescues them, a helicopter-umbrella.