Whilst Tenchi enjoys summer break with his friends in Tokyo, back in Okayama, Sasami is delighted when Yugi pays her a surprise visit. Whilst the two girls spend the day at the lake, Washu finally emerges from the lab with some interesting news- according to her research, Yugi originally came from planet Jurai! At Washu's request, Ayeka heads to the Okutama ruins, hoping that the ancient Juraian shrine will provide some clues as to who Yugi is, and how she came to end up on the Earth…