The sheltered adopted Heaven, daughter to one of Japan's wealthiest families, grew up in a protected environment, but now she suddenly is in San Francisco and her dad plans to marry her off to the son of one of his business partners.
Heaven learns that her past is linked to an ancient secret prophecy - she finds herself in the middle of the fight between good and evil. Her father hands her the family sword, The Whisper of Death, despite her plea to give it to her brother.