Tenchi Masaki's life is altered permanently when the vessel of the notorious space pirate Ryouko Hakubi is shot down and crashes close to his family's temple. Tenchi is unaware that rescuing Ryouko will trigger a chain of events resulting in alien women from various backgrounds moving into his home. These arrivals include the fragile Princess Aeka of Jurai and her lighthearted younger sister, Princess Sasami; the absent-minded first-class detective Mihoshi Kuramitsu and her more competent partner Kiyone Makibi; and the quirky, mad scientist Washuu Hakubi. The six women strive to adjust to their new existence, yet their more sophisticated and exotic way of life clashes with Earth's simple customs. Consequently, they merely create chaos and cause problems for unfortunate Tenchi. Although the girls are a nuisance, Tenchi starts to build a close connection with each of them, and via this bond, he starts to comprehend his place in the universe better.