While visiting a pumpkin farm, two friends learn all about pumpkins, how they grow, what they taste like, and why people make them into jack-o-lanterns.
When Homer puts his jack-o-lantern over his head like a helmet on the eve of Halloween, he gains access to a secret nocturnal meeting of the trees as they celebrate the arrival of the full moon.
A pumpkin shimmering in the moonlight attracts the attention of an owl, a cat, crickets, a witch, and a group of boys and girls, who change it into a scary jack-o-lantern.