SpongeBob decides to leave his civilized life in Bikini Bottom, and go live uninhibited and free, among a pack of wild jellyfish. During this time, Sandy and Patrick are trying to come up with plans to try to get SpongeBob back. Squidward wants to sell his house and move away, but he knows that no one will buy it if they see rambunctious SpongeBob around. So Squidward decides to tell SpongeBob that today is "Opposite Day," in hopes that he will behave around the real estate agent.