Following the ascension to power of Taira no Kiyomori, the Minamoto clan is exiled. Minamoto no Yoritomo meets Masako, the sister of Hōjō Yoshitoki and later marries her. Following this marriage, the gears of Yoshitoki's destiny begin to turn.
A young orphan named Biwa is taken in by the powerful Taira Clan—also known as the Heike—after their leader witnesses her extraordinary psychic abilities. Unfortunately, what she predicts is a future of bloodshed, violence, and civil war. Inspired by the 12th-century epic tale Heike Monogatari.