Unterralym is a void, an abyss created just nineteen years ago. There is nearly no escape from it, and those rare people that have escaped haven't dared to tell of their experience in there. Carter Bentalon is a young man and has been engaged to the lovely, and wealthy Erin Fentille for as long as he could remember, arranged by his money-lust father. The first time he meets his fiancee is the same day he meets Lillian, a strange girl that Erin claims as her younger sister.