Tenchi and co. find their existence unsettled by a time-travelling entity called Kain. Desiring revenge upon the Juraian emperor, Tenchi, Kain travels back in time to kill Tenchi's mother.

"Tenchi Muyo in Love" and "Tenchi Forever" are sequels to the series "Tenchi Muyo! Tenchi Universe" whereas movie two "Daughter of Darkness" follows on from the OVAs.