A jellyfish insists on following SpongeBob home after a day out at Jellyfish Fields, so SpongeBob decides on letting it spend the night at his home. Squidward warns SpongeBob that jellyfish are wild animals and that they should not be domesticated, but SpongeBob completely ignores him. At home, SpongeBob dances with the jellyfish to loud techno rave music, which annoys Squidward to no end. After 12 hours of this form of nonstop partying, SpongeBob finally decides that it is time to go to bed, but this Jellyfish does not want to stop. SpongeBob eventually forces it to go to bed by tying a leash around it, but during the night, while SpongeBob sleeps, the jellyfish escapes and brings lots of his friends into SpongeBob’s house.
The next morning, SpongeBob wakes up to find his living room filled with hundreds of dancing jellyfish. He attempts to make them leave, but to no avail. Squidward, annoyed by this, decides that “two can play at this,” and starts loudly playing his clarinet, angering the jellyfish, who start destroying SpongeBob’s house. SpongeBob asks Squidward to play his clarinet a little “better,” and Squidward responds by intentionally playing even worse and much louder. This prompts the jellyfish to go to his house and sting him before returning to SpongeBob’s house. A sting-covered Squidward says to SpongeBob “Everybody’s a critic. You won’t be hearing from me anymore,” and gives him his clarinet. The jellyfish hastily grab it from SpongeBob, break it in half, burn it and dance around it. This further angers SpongeBob, who attempts to remove the stereo system, destroying it in the process, and the angered jellyfish begin stinging and chasing him. SpongeBob and Gary go up to the roof of the house, but the swarm follows them outside and surrounds them. Then Gary drives them away by clicking his eyes together, producing a sound that calms the Jellyfish. SpongeBob tells Gary to keep doing this, and puts him on his head. SpongeBob walks downstairs and out the front door, with the Jellyfish following him. As he leads them back to Jellyfish Fields, more sounds join Gary’s clicking, eventually becoming a full-fledged song. In the last scene, the severely stung Squidward is shown getting into a bathtub as the episode ends.