The Algae Brothers mock Squish when he claims the school is being invaded by a monster worm that only Squish has ever seen. But it's the Algae Brothers who are begging Squish for protection when they realize the monster is real and it's a Nematode - who loves to eat algae. Squish must now help the kids that made fun of him, as well as work with Pod and Peggy to scare away the giant creature.