The spirit of Princess Lena, the last emperor of the planet Lectorius who vanished 700 years ago, arrived on Earth as a sphere of light, seeking to inhabit the body of Tsushima Reina. Reina finds herself torn between her lover Kensuke and her stepmother Miyako and her fiancé Domoto. Manipulated by the threads of fate, as the bewildered Reina wanders, she is suddenly attacked by a strange clan. What is Reina's true identity? What are her real intentions? And will the day of the Great Giant God's revival, foretold by Princess Lena, truly come? Earth's final day draws ever closer...