Startica is the Summer Festival on Jurai. Many years ago, Tenchi`s grandfather, Yosho, met a young girl during Startica and just as their relationship blossomed, she was attacked by the Jurai Palace who revealed that the girl was Yuzuha - the Demon of Darkness!

Wounded by the attack, Yuzuha fled, but many years later her feeling of betrayal lead her to plan her revenge by taking Yosho`s only grandson; Tenchi!

On a hot summer day, a fetching young girl named Mayuka appears to Tenchi, calling him Daddy! Jealousy and envy follow as Ryoko and Ayeka battle for Tenchi`s attention with an apparently new rival. Who could the mother be?!

Sasami befriends Mayuka as they compare Earth`s Christmas and Jurai`s Startica celebrations and Mayuka is welcomed into the Masaki household.

However, Mayuka is just a puppet of the Demon, Yuzuha, and it`s her plan to bring Tenchi to the Nightmare World completing her revenge! Will Tenchi be able to resist Mayuka`s love? Can Sasami convince Mayuka to change?

It`s a battle for Mayuka as she chooses between her parents; Tenchi and Yuzuha! To be the Daughter of Light or the Daughter of Darkness!