While looking for spare change, Mr. Krabs notices an over-sized soybean at Sandy's Treedome. Mr. Krabs is interested in what could have enlarged the plant, and Sandy revealed an experimental growth formula, which Mr. Krabs steals out of sight. At the Krusty Krab, he uses the growth formula on a Krabby Patty, but it keeps on growing until chaos erupts.

SpongeBob receives a letter from an old friend Bubble Buddy, asking to babysit his son Shiny, who causes mischievous antics. SpongeBob must keep Shiny out of trouble and away from sharp and pointy edges.