Life is chaotic at the Masaki household as Ayeka and Washu plant a spaceship, Ryoko makes a play for Tenchi, and Mihoshi is tricked into reporting back to GP Headquarters.
When Tenchi and his ladies are forced to watch his baby cousin, all heck breaks loose! Poor Tenchi is clueless, the ladies are hopeless, and only Washu can restore order to the hosue!
It's time for a trip to the hot springs! Unfortunately, there are a lot of repairs that need to be made before Tenchi and the girls can get wet and wild!