SpongeBob is so focused on defeating the Dirty Bubble in a paddleball challenge that he forgets to feed his pet snail, Gary, for a whole week! So Gary decides it's time to pack his bags and find a new home. While Gary is being pampered by sweet Grandma, SpongeBob is posting lost-snail signs all over town. Soon Gary becomes suspicious that Grandma is after more than just his happiness. Can SpongeBob save Gary before it's too late?