Arwin's mother gets married and she moves out, Arwin his heartbroken over his mother's departure, Zack and Cody allow Arwin to stay with them but his antics start to annoy the twins and Carey. Zack and Cody help Arwin pack all of his knick-knacks, the twins give Arwin's apartment a make-over. Meanwhile, Lance breaks up with London and she doesn't take the break up well. London has Nia get information over Lance's mystery girlfriend. Nia reveals to London that Lance is dating a mermaid, even though she is not a actual mermaid. London decides to win Lance over by dressing up like a mermaid, but her efforts on winning her ex-boyfriend back results in her getting into a fight with Wanda (Lance's current girlfriend) and it ends with her getting injured. London and Lance realize they barely have anything in common, she immediately breaks up with him. At the lobby, Zack and Cody notice Norman is dressed like Neptune. Cody asks Zack where he put the owls and he reveals to Cody that he gave the owls a home. Mr. Moseby walks into his office and he sees the owls, causing him to run away in terror.
—dawsonpersi