The worm leader, who goes by the name of Slobbo-his real name is too difficult to pronounce-is a kind of "wormsley" Napoleon, who wants and plans to take over much of the earth and make all the earthlings subservient to him. Many skirmishes occur where many earth people are killed, but very few worms. What was treated as a joke at first becomes a very serious threat. Finally, Slobbo is kidnapped and brought to a planet in the constellation of Orion, but he soon reappears on earth with all his fighting worms intact, making ready to take over.
Slobbo has an earthling partner, named Marvin, who works with him because of jealousy on account of a botched love affair, and the two of them are put on trial. Slobbo is sentenced to be shot at sight. Lady V. convinces him to give up his heroic plans, which he does for a while, but then his need to be known as a heroic warrior overpowers him. Finally, the threat of disaster to his whole race of little green worms, including himself, persuades him to forget his heroic plans and become just a pleasant, normal worm.