Annoyed by her brother's showing off, Liv accidentally reveals to her classmates that Andy cannot swim well and Andy feels betrayed. To defeat Vochaos, a ghost who makes everyone dumb, the two siblings must stop fighting each other.

Glowboo's new update is so impressive that Liv fears Miss Jones will so no longer need the Ghostforce. When our heroes meet Cyclopee, a ghost who copies everything, even her powers, Liv has to accept Glowboo's help.