Set in the timeless world of Japanese Mythology, Sei tells the story of the uncertain origin of the Japanese equivalent of Death, the female Grim Reaper. Sei is an epic legend about love and betrayal taking place in a world of Gods, Goddesses and mythical creatures. Tsuchi, the fire goddess, tells the story of how her birth caused the death of her mother, Izanami. Izanagi is so distraught by his wife's death that he goes berserk. His desire to be reunited with Izanami brings him to the farthest reaches of the Netherlands where no mortal may fear to tread. A battle of epic proportions ensues in which mythical Japan will never be the same... but was Sei formerly Izanami, the primordial goddess and personification of the Earth and darkness...?