
A square yellow sponge named SpongeBob SquarePants lives in a pineapple with his pet snail, Gary, in the city of Bikini Bottom on the floor of the Pacific Ocean. He works as a fry cook at the Krusty Krab. During his time off, SpongeBob has a knack for attracting trouble with his starfish best friend, Patrick. Arrogant octopus Squidward Tentacles, SpongeBob's neighbor, dislikes SpongeBob because of his childlike behavior.

When his pet amoeba Spot has puppies, Plankton decides to use them in another of his nefarious plots; Mr. Krabs is afraid to get his physical, but if he does not pass the Krusty Krab will be shut down.

Plankton creates a clone of himself and Mr. Krabs, but neither restaurant is safe from the newcomer; Squidward gleefully switches jobs with a bus driver for an easy ride, until SpongeBob and Patrick climb aboard.

Squidward's new life is threatened; stuck in her dome, Sandy suspects Plankton's up to no good and gets Patrick to investigate.

Patrick inducts SpongeBob into his prestigious society of dullards and doofuses; Patrick takes his grime to a new extreme, playing around in so much trash that he becomes unrecognizable.