
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.

Plankton invents a machine enabling him to switch lives with Mr. Krabs; SpongeBob volunteers for lifeguard duty.

SpongeBob and Patrick visit a retirement home; SpongeBob loses his confidence.

When the Krusty Krab runs out of mustard, Mr. Krabs sends SpongeBob, Patrick and Squidward to dig up some more; SpongeBob and Sandy have to collect Krabby Patty ingredients, but Plankton follows their every step.

Squidward gets SpongeBob fired; Sandy and SpongeBob encounter a ferocious worm.