When Denver, Casey and Freddy Facknitts accidentally become airborne in the latter's created aircraft, rumours of UFO sightings start to spread through the town.

In an embellished version of 'Jack And the Beanstalk', Denver buys some magic corn kernels off Morton Fizzback, which are thrown into the ground and grow into a giant cornstalk, which Denver climbs to find the giantess of the castle (Bertha Bird).

Denver's mistaken identity at a golf tournament sets Fizzback and Funt off on a high-tech cheating spree, while the golf course Groundskeeper tries to capture what he believes to be theLoch Ness Monster.